Home / 20,414.40-28,164.96-12,966.72

Finding the Fourth Proportional to 20,414.40, 28,164.96 and 12,966.72

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Solution

The fourth proportional to 20,414.40, 28,164.96 and 12,966.72 is: 17,889.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,414.40 : 28,164.96 = 12,966.72 : x
  2. Step 2: Convert to fraction form
    20,414.40/28,164.96 = 12,966.72/x
  3. Step 3: Cross multiply
    20,414.40x = 28,164.96 × 12,966.72
  4. Step 4: Simplify right side
    20,414.40x = 365,207,150.13
  5. Step 5: Solve for x
    x = 365,207,150.13/20,414.40
  6. Step 6: Final answer
    x = 17,889.68

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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.