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Finding the Fourth Proportional to 18,687.66, 28,036.53 and 6,209.70

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Solution

The fourth proportional to 18,687.66, 28,036.53 and 6,209.70 is: 9,316.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.66 : 28,036.53 = 6,209.70 : x
  2. Step 2: Convert to fraction form
    18,687.66/28,036.53 = 6,209.70/x
  3. Step 3: Cross multiply
    18,687.66x = 28,036.53 × 6,209.70
  4. Step 4: Simplify right side
    18,687.66x = 174,098,440.34
  5. Step 5: Solve for x
    x = 174,098,440.34/18,687.66
  6. Step 6: Final answer
    x = 9,316.22

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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.