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Finding the Fourth Proportional to 25,397.70, 38,133.54 and 18,754.70

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Solution

The fourth proportional to 25,397.70, 38,133.54 and 18,754.70 is: 28,159.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,397.70 : 38,133.54 = 18,754.70 : x
  2. Step 2: Convert to fraction form
    25,397.70/38,133.54 = 18,754.70/x
  3. Step 3: Cross multiply
    25,397.70x = 38,133.54 × 18,754.70
  4. Step 4: Simplify right side
    25,397.70x = 715,182,911.97
  5. Step 5: Solve for x
    x = 715,182,911.97/25,397.70
  6. Step 6: Final answer
    x = 28,159.36

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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.