Home / 15,501.30-21,389.40-9,131.10

Finding the Fourth Proportional to 15,501.30, 21,389.40 and 9,131.10

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Solution

The fourth proportional to 15,501.30, 21,389.40 and 9,131.10 is: 12,599.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,501.30 : 21,389.40 = 9,131.10 : x
  2. Step 2: Convert to fraction form
    15,501.30/21,389.40 = 9,131.10/x
  3. Step 3: Cross multiply
    15,501.30x = 21,389.40 × 9,131.10
  4. Step 4: Simplify right side
    15,501.30x = 195,308,750.34
  5. Step 5: Solve for x
    x = 195,308,750.34/15,501.30
  6. Step 6: Final answer
    x = 12,599.51

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Half scale
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Double scale
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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.