Home / 28,531.60-42,821.70-12,760.90

Finding the Fourth Proportional to 28,531.60, 42,821.70 and 12,760.90

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Solution

The fourth proportional to 28,531.60, 42,821.70 and 12,760.90 is: 19,152.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,531.60 : 42,821.70 = 12,760.90 : x
  2. Step 2: Convert to fraction form
    28,531.60/42,821.70 = 12,760.90/x
  3. Step 3: Cross multiply
    28,531.60x = 42,821.70 × 12,760.90
  4. Step 4: Simplify right side
    28,531.60x = 546,443,431.53
  5. Step 5: Solve for x
    x = 546,443,431.53/28,531.60
  6. Step 6: Final answer
    x = 19,152.22

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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.