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Finding the Fourth Proportional to 39,329.60, 54,275.76 and 21,425.60

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Solution

The fourth proportional to 39,329.60, 54,275.76 and 21,425.60 is: 29,567.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,329.60 : 54,275.76 = 21,425.60 : x
  2. Step 2: Convert to fraction form
    39,329.60/54,275.76 = 21,425.60/x
  3. Step 3: Cross multiply
    39,329.60x = 54,275.76 × 21,425.60
  4. Step 4: Simplify right side
    39,329.60x = 1,162,890,723.46
  5. Step 5: Solve for x
    x = 1,162,890,723.46/39,329.60
  6. Step 6: Final answer
    x = 29,567.82

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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.