Home / 15,499.76-21,390.15-8,785.13

Finding the Fourth Proportional to 15,499.76, 21,390.15 and 8,785.13

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Solution

The fourth proportional to 15,499.76, 21,390.15 and 8,785.13 is: 12,123.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,499.76 : 21,390.15 = 8,785.13 : x
  2. Step 2: Convert to fraction form
    15,499.76/21,390.15 = 8,785.13/x
  3. Step 3: Cross multiply
    15,499.76x = 21,390.15 × 8,785.13
  4. Step 4: Simplify right side
    15,499.76x = 187,915,330.23
  5. Step 5: Solve for x
    x = 187,915,330.23/15,499.76
  6. Step 6: Final answer
    x = 12,123.76

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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.