Home / 15,331.29-21,159-8,617.20

Finding the Fourth Proportional to 15,331.29, 21,159 and 8,617.20

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Solution

The fourth proportional to 15,331.29, 21,159 and 8,617.20 is: 11,892.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,331.29 : 21,159 = 8,617.20 : x
  2. Step 2: Convert to fraction form
    15,331.29/21,159 = 8,617.20/x
  3. Step 3: Cross multiply
    15,331.29x = 21,159 × 8,617.20
  4. Step 4: Simplify right side
    15,331.29x = 182,331,334.80
  5. Step 5: Solve for x
    x = 182,331,334.80/15,331.29
  6. Step 6: Final answer
    x = 11,892.76

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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.