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Finding the Fourth Proportional to 41,280.90, 61,929.96 and 18,780.90

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Solution

The fourth proportional to 41,280.90, 61,929.96 and 18,780.90 is: 28,175.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,280.90 : 61,929.96 = 18,780.90 : x
  2. Step 2: Convert to fraction form
    41,280.90/61,929.96 = 18,780.90/x
  3. Step 3: Cross multiply
    41,280.90x = 61,929.96 × 18,780.90
  4. Step 4: Simplify right side
    41,280.90x = 1,163,100,385.76
  5. Step 5: Solve for x
    x = 1,163,100,385.76/41,280.90
  6. Step 6: Final answer
    x = 28,175.27

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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.