Home / 18,445.20-25,480.62-15,820.80

Finding the Fourth Proportional to 18,445.20, 25,480.62 and 15,820.80

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Solution

The fourth proportional to 18,445.20, 25,480.62 and 15,820.80 is: 21,855.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,445.20 : 25,480.62 = 15,820.80 : x
  2. Step 2: Convert to fraction form
    18,445.20/25,480.62 = 15,820.80/x
  3. Step 3: Cross multiply
    18,445.20x = 25,480.62 × 15,820.80
  4. Step 4: Simplify right side
    18,445.20x = 403,123,792.90
  5. Step 5: Solve for x
    x = 403,123,792.90/18,445.20
  6. Step 6: Final answer
    x = 21,855.21

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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.