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Finding the Fourth Proportional to 38,398.70, 57,589.40 and 13,774.70

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Solution

The fourth proportional to 38,398.70, 57,589.40 and 13,774.70 is: 20,658.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,398.70 : 57,589.40 = 13,774.70 : x
  2. Step 2: Convert to fraction form
    38,398.70/57,589.40 = 13,774.70/x
  3. Step 3: Cross multiply
    38,398.70x = 57,589.40 × 13,774.70
  4. Step 4: Simplify right side
    38,398.70x = 793,276,708.18
  5. Step 5: Solve for x
    x = 793,276,708.18/38,398.70
  6. Step 6: Final answer
    x = 20,658.95

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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.