Home / 31,854.08-47,761.68-13,128.32

Finding the Fourth Proportional to 31,854.08, 47,761.68 and 13,128.32

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Solution

The fourth proportional to 31,854.08, 47,761.68 and 13,128.32 is: 19,684.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,854.08 : 47,761.68 = 13,128.32 : x
  2. Step 2: Convert to fraction form
    31,854.08/47,761.68 = 13,128.32/x
  3. Step 3: Cross multiply
    31,854.08x = 47,761.68 × 13,128.32
  4. Step 4: Simplify right side
    31,854.08x = 627,030,618.78
  5. Step 5: Solve for x
    x = 627,030,618.78/31,854.08
  6. Step 6: Final answer
    x = 19,684.47

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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.