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Finding the Fourth Proportional to 15,501.99, 21,392.99 and 8,428.44

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Solution

The fourth proportional to 15,501.99, 21,392.99 and 8,428.44 is: 11,631.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,501.99 : 21,392.99 = 8,428.44 : x
  2. Step 2: Convert to fraction form
    15,501.99/21,392.99 = 8,428.44/x
  3. Step 3: Cross multiply
    15,501.99x = 21,392.99 × 8,428.44
  4. Step 4: Simplify right side
    15,501.99x = 180,309,490.49
  5. Step 5: Solve for x
    x = 180,309,490.49/15,501.99
  6. Step 6: Final answer
    x = 11,631.38

Related Problems

Find fourth proportional to 7,751.00, 10,696.49 and 4,214.22
Half scale
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Double scale
Find fourth proportional to 15,502.99, 21,394.37 and 8,429.44
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.