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Finding the Fourth Proportional to 25,863.80, 35,691.10 and 15,809.08

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Solution

The fourth proportional to 25,863.80, 35,691.10 and 15,809.08 is: 21,815.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,863.80 : 35,691.10 = 15,809.08 : x
  2. Step 2: Convert to fraction form
    25,863.80/35,691.10 = 15,809.08/x
  3. Step 3: Cross multiply
    25,863.80x = 35,691.10 × 15,809.08
  4. Step 4: Simplify right side
    25,863.80x = 564,243,455.19
  5. Step 5: Solve for x
    x = 564,243,455.19/25,863.80
  6. Step 6: Final answer
    x = 21,815.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.