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Finding the Fourth Proportional to 25,863.48, 38,788.14 and 7,139.04

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Solution

The fourth proportional to 25,863.48, 38,788.14 and 7,139.04 is: 10,706.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,863.48 : 38,788.14 = 7,139.04 : x
  2. Step 2: Convert to fraction form
    25,863.48/38,788.14 = 7,139.04/x
  3. Step 3: Cross multiply
    25,863.48x = 38,788.14 × 7,139.04
  4. Step 4: Simplify right side
    25,863.48x = 276,910,082.99
  5. Step 5: Solve for x
    x = 276,910,082.99/25,863.48
  6. Step 6: Final answer
    x = 10,706.61

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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.