Home / 19,876.50-29,821.77-8,781.75

Finding the Fourth Proportional to 19,876.50, 29,821.77 and 8,781.75

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Solution

The fourth proportional to 19,876.50, 29,821.77 and 8,781.75 is: 13,175.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,876.50 : 29,821.77 = 8,781.75 : x
  2. Step 2: Convert to fraction form
    19,876.50/29,821.77 = 8,781.75/x
  3. Step 3: Cross multiply
    19,876.50x = 29,821.77 × 8,781.75
  4. Step 4: Simplify right side
    19,876.50x = 261,887,328.70
  5. Step 5: Solve for x
    x = 261,887,328.70/19,876.50
  6. Step 6: Final answer
    x = 13,175.73

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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.