Home / 15,499.38-21,389.10-8,425.74

Finding the Fourth Proportional to 15,499.38, 21,389.10 and 8,425.74

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Solution

The fourth proportional to 15,499.38, 21,389.10 and 8,425.74 is: 11,627.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,499.38 : 21,389.10 = 8,425.74 : x
  2. Step 2: Convert to fraction form
    15,499.38/21,389.10 = 8,425.74/x
  3. Step 3: Cross multiply
    15,499.38x = 21,389.10 × 8,425.74
  4. Step 4: Simplify right side
    15,499.38x = 180,218,995.43
  5. Step 5: Solve for x
    x = 180,218,995.43/15,499.38
  6. Step 6: Final answer
    x = 11,627.50

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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.