Home / 10,531.12-15,785.70-4,288.42

Finding the Fourth Proportional to 10,531.12, 15,785.70 and 4,288.42

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Solution

The fourth proportional to 10,531.12, 15,785.70 and 4,288.42 is: 6,428.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,531.12 : 15,785.70 = 4,288.42 : x
  2. Step 2: Convert to fraction form
    10,531.12/15,785.70 = 4,288.42/x
  3. Step 3: Cross multiply
    10,531.12x = 15,785.70 × 4,288.42
  4. Step 4: Simplify right side
    10,531.12x = 67,695,711.59
  5. Step 5: Solve for x
    x = 67,695,711.59/10,531.12
  6. Step 6: Final answer
    x = 6,428.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.