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Finding the Fourth Proportional to 31,572.60, 47,315.70 and 25,740.60

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Solution

The fourth proportional to 31,572.60, 47,315.70 and 25,740.60 is: 38,575.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,572.60 : 47,315.70 = 25,740.60 : x
  2. Step 2: Convert to fraction form
    31,572.60/47,315.70 = 25,740.60/x
  3. Step 3: Cross multiply
    31,572.60x = 47,315.70 × 25,740.60
  4. Step 4: Simplify right side
    31,572.60x = 1,217,934,507.42
  5. Step 5: Solve for x
    x = 1,217,934,507.42/31,572.60
  6. Step 6: Final answer
    x = 38,575.68

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1.5x scale

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.