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Finding the Fourth Proportional to 17,154.70, 25,721.10 and 7,288.90

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Solution

The fourth proportional to 17,154.70, 25,721.10 and 7,288.90 is: 10,928.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,154.70 : 25,721.10 = 7,288.90 : x
  2. Step 2: Convert to fraction form
    17,154.70/25,721.10 = 7,288.90/x
  3. Step 3: Cross multiply
    17,154.70x = 25,721.10 × 7,288.90
  4. Step 4: Simplify right side
    17,154.70x = 187,478,525.79
  5. Step 5: Solve for x
    x = 187,478,525.79/17,154.70
  6. Step 6: Final answer
    x = 10,928.70

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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.