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Finding the Fourth Proportional to 28,532.70, 42,811.20 and 18,010.80

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Solution

The fourth proportional to 28,532.70, 42,811.20 and 18,010.80 is: 27,023.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,532.70 : 42,811.20 = 18,010.80 : x
  2. Step 2: Convert to fraction form
    28,532.70/42,811.20 = 18,010.80/x
  3. Step 3: Cross multiply
    28,532.70x = 42,811.20 × 18,010.80
  4. Step 4: Simplify right side
    28,532.70x = 771,063,960.96
  5. Step 5: Solve for x
    x = 771,063,960.96/28,532.70
  6. Step 6: Final answer
    x = 27,023.87

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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.