Home / 20,868.29-28,793.10-12,372.40

Finding the Fourth Proportional to 20,868.29, 28,793.10 and 12,372.40

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Solution

The fourth proportional to 20,868.29, 28,793.10 and 12,372.40 is: 17,070.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,868.29 : 28,793.10 = 12,372.40 : x
  2. Step 2: Convert to fraction form
    20,868.29/28,793.10 = 12,372.40/x
  3. Step 3: Cross multiply
    20,868.29x = 28,793.10 × 12,372.40
  4. Step 4: Simplify right side
    20,868.29x = 356,239,750.44
  5. Step 5: Solve for x
    x = 356,239,750.44/20,868.29
  6. Step 6: Final answer
    x = 17,070.86

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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.