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Finding the Fourth Proportional to 20,307.60, 30,437.10 and 18,217.80

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Solution

The fourth proportional to 20,307.60, 30,437.10 and 18,217.80 is: 27,304.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,307.60 : 30,437.10 = 18,217.80 : x
  2. Step 2: Convert to fraction form
    20,307.60/30,437.10 = 18,217.80/x
  3. Step 3: Cross multiply
    20,307.60x = 30,437.10 × 18,217.80
  4. Step 4: Simplify right side
    20,307.60x = 554,497,000.38
  5. Step 5: Solve for x
    x = 554,497,000.38/20,307.60
  6. Step 6: Final answer
    x = 27,304.90

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1.5x scale

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.