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Finding the Fourth Proportional to 18,281.70, 27,424.98 and 8,423.19

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Solution

The fourth proportional to 18,281.70, 27,424.98 and 8,423.19 is: 12,635.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,281.70 : 27,424.98 = 8,423.19 : x
  2. Step 2: Convert to fraction form
    18,281.70/27,424.98 = 8,423.19/x
  3. Step 3: Cross multiply
    18,281.70x = 27,424.98 × 8,423.19
  4. Step 4: Simplify right side
    18,281.70x = 231,005,817.29
  5. Step 5: Solve for x
    x = 231,005,817.29/18,281.70
  6. Step 6: Final answer
    x = 12,635.90

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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.