Home / 20,612.61-28,414.40-16,128.58

Finding the Fourth Proportional to 20,612.61, 28,414.40 and 16,128.58

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Solution

The fourth proportional to 20,612.61, 28,414.40 and 16,128.58 is: 22,233.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,612.61 : 28,414.40 = 16,128.58 : x
  2. Step 2: Convert to fraction form
    20,612.61/28,414.40 = 16,128.58/x
  3. Step 3: Cross multiply
    20,612.61x = 28,414.40 × 16,128.58
  4. Step 4: Simplify right side
    20,612.61x = 458,283,923.55
  5. Step 5: Solve for x
    x = 458,283,923.55/20,612.61
  6. Step 6: Final answer
    x = 22,233.18

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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.