Home / 20,005.60-29,989.20-15,560.80

Finding the Fourth Proportional to 20,005.60, 29,989.20 and 15,560.80

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Solution

The fourth proportional to 20,005.60, 29,989.20 and 15,560.80 is: 23,326.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,005.60 : 29,989.20 = 15,560.80 : x
  2. Step 2: Convert to fraction form
    20,005.60/29,989.20 = 15,560.80/x
  3. Step 3: Cross multiply
    20,005.60x = 29,989.20 × 15,560.80
  4. Step 4: Simplify right side
    20,005.60x = 466,655,943.36
  5. Step 5: Solve for x
    x = 466,655,943.36/20,005.60
  6. Step 6: Final answer
    x = 23,326.27

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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.