Home / 20,761.48-28,650.90-12,377.80

Finding the Fourth Proportional to 20,761.48, 28,650.90 and 12,377.80

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Solution

The fourth proportional to 20,761.48, 28,650.90 and 12,377.80 is: 17,081.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,761.48 : 28,650.90 = 12,377.80 : x
  2. Step 2: Convert to fraction form
    20,761.48/28,650.90 = 12,377.80/x
  3. Step 3: Cross multiply
    20,761.48x = 28,650.90 × 12,377.80
  4. Step 4: Simplify right side
    20,761.48x = 354,635,110.02
  5. Step 5: Solve for x
    x = 354,635,110.02/20,761.48
  6. Step 6: Final answer
    x = 17,081.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.