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Finding the Fourth Proportional to 18,488.70, 27,711.45 and 9,719.10

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Solution

The fourth proportional to 18,488.70, 27,711.45 and 9,719.10 is: 14,567.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,488.70 : 27,711.45 = 9,719.10 : x
  2. Step 2: Convert to fraction form
    18,488.70/27,711.45 = 9,719.10/x
  3. Step 3: Cross multiply
    18,488.70x = 27,711.45 × 9,719.10
  4. Step 4: Simplify right side
    18,488.70x = 269,330,353.70
  5. Step 5: Solve for x
    x = 269,330,353.70/18,488.70
  6. Step 6: Final answer
    x = 14,567.30

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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.