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Finding the Fourth Proportional to 25,456.40, 38,218.80 and 14,937.20

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Solution

The fourth proportional to 25,456.40, 38,218.80 and 14,937.20 is: 22,425.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,456.40 : 38,218.80 = 14,937.20 : x
  2. Step 2: Convert to fraction form
    25,456.40/38,218.80 = 14,937.20/x
  3. Step 3: Cross multiply
    25,456.40x = 38,218.80 × 14,937.20
  4. Step 4: Simplify right side
    25,456.40x = 570,881,859.36
  5. Step 5: Solve for x
    x = 570,881,859.36/25,456.40
  6. Step 6: Final answer
    x = 22,425.87

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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.