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Finding the Fourth Proportional to 18,572.76, 27,859.32 and 4,721.76

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Solution

The fourth proportional to 18,572.76, 27,859.32 and 4,721.76 is: 7,082.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,572.76 : 27,859.32 = 4,721.76 : x
  2. Step 2: Convert to fraction form
    18,572.76/27,859.32 = 4,721.76/x
  3. Step 3: Cross multiply
    18,572.76x = 27,859.32 × 4,721.76
  4. Step 4: Simplify right side
    18,572.76x = 131,545,022.80
  5. Step 5: Solve for x
    x = 131,545,022.80/18,572.76
  6. Step 6: Final answer
    x = 7,082.69

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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.