Home / 20,380.04-28,138.18-12,734.92

Finding the Fourth Proportional to 20,380.04, 28,138.18 and 12,734.92

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Solution

The fourth proportional to 20,380.04, 28,138.18 and 12,734.92 is: 17,582.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,380.04 : 28,138.18 = 12,734.92 : x
  2. Step 2: Convert to fraction form
    20,380.04/28,138.18 = 12,734.92/x
  3. Step 3: Cross multiply
    20,380.04x = 28,138.18 × 12,734.92
  4. Step 4: Simplify right side
    20,380.04x = 358,337,471.25
  5. Step 5: Solve for x
    x = 358,337,471.25/20,380.04
  6. Step 6: Final answer
    x = 17,582.77

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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.