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Finding the Fourth Proportional to 15,605.98, 21,533.73 and 8,891.71

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Solution

The fourth proportional to 15,605.98, 21,533.73 and 8,891.71 is: 12,269.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,605.98 : 21,533.73 = 8,891.71 : x
  2. Step 2: Convert to fraction form
    15,605.98/21,533.73 = 8,891.71/x
  3. Step 3: Cross multiply
    15,605.98x = 21,533.73 × 8,891.71
  4. Step 4: Simplify right side
    15,605.98x = 191,471,682.38
  5. Step 5: Solve for x
    x = 191,471,682.38/15,605.98
  6. Step 6: Final answer
    x = 12,269.12

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Half scale
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Double scale
Find fourth proportional to 15,606.98, 21,535.11 and 8,892.71
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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.