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Finding the Fourth Proportional to 18,706.74, 28,061.63 and 5,559.13

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Solution

The fourth proportional to 18,706.74, 28,061.63 and 5,559.13 is: 8,339.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,706.74 : 28,061.63 = 5,559.13 : x
  2. Step 2: Convert to fraction form
    18,706.74/28,061.63 = 5,559.13/x
  3. Step 3: Cross multiply
    18,706.74x = 28,061.63 × 5,559.13
  4. Step 4: Simplify right side
    18,706.74x = 155,998,108.87
  5. Step 5: Solve for x
    x = 155,998,108.87/18,706.74
  6. Step 6: Final answer
    x = 8,339.14

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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.