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Finding the Fourth Proportional to 25,901.60, 38,890.80 and 20,064.80

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Solution

The fourth proportional to 25,901.60, 38,890.80 and 20,064.80 is: 30,126.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,901.60 : 38,890.80 = 20,064.80 : x
  2. Step 2: Convert to fraction form
    25,901.60/38,890.80 = 20,064.80/x
  3. Step 3: Cross multiply
    25,901.60x = 38,890.80 × 20,064.80
  4. Step 4: Simplify right side
    25,901.60x = 780,336,123.84
  5. Step 5: Solve for x
    x = 780,336,123.84/25,901.60
  6. Step 6: Final answer
    x = 30,126.95

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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.