Home / 20,478.30-28,253.01-12,414.56

Finding the Fourth Proportional to 20,478.30, 28,253.01 and 12,414.56

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Solution

The fourth proportional to 20,478.30, 28,253.01 and 12,414.56 is: 17,127.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,478.30 : 28,253.01 = 12,414.56 : x
  2. Step 2: Convert to fraction form
    20,478.30/28,253.01 = 12,414.56/x
  3. Step 3: Cross multiply
    20,478.30x = 28,253.01 × 12,414.56
  4. Step 4: Simplify right side
    20,478.30x = 350,748,546.56
  5. Step 5: Solve for x
    x = 350,748,546.56/20,478.30
  6. Step 6: Final answer
    x = 17,127.82

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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.