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Finding the Fourth Proportional to 25,648.60, 38,429.70 and 12,472.60

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Solution

The fourth proportional to 25,648.60, 38,429.70 and 12,472.60 is: 18,687.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,648.60 : 38,429.70 = 12,472.60 : x
  2. Step 2: Convert to fraction form
    25,648.60/38,429.70 = 12,472.60/x
  3. Step 3: Cross multiply
    25,648.60x = 38,429.70 × 12,472.60
  4. Step 4: Simplify right side
    25,648.60x = 479,318,276.22
  5. Step 5: Solve for x
    x = 479,318,276.22/25,648.60
  6. Step 6: Final answer
    x = 18,687.89

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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.