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Finding the Fourth Proportional to 25,398.70, 38,135.04 and 18,755.70

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Solution

The fourth proportional to 25,398.70, 38,135.04 and 18,755.70 is: 28,160.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,398.70 : 38,135.04 = 18,755.70 : x
  2. Step 2: Convert to fraction form
    25,398.70/38,135.04 = 18,755.70/x
  3. Step 3: Cross multiply
    25,398.70x = 38,135.04 × 18,755.70
  4. Step 4: Simplify right side
    25,398.70x = 715,249,369.73
  5. Step 5: Solve for x
    x = 715,249,369.73/25,398.70
  6. Step 6: Final answer
    x = 28,160.87

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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.