Home / 20,438.28-28,204.38-11,363.04

Finding the Fourth Proportional to 20,438.28, 28,204.38 and 11,363.04

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Solution

The fourth proportional to 20,438.28, 28,204.38 and 11,363.04 is: 15,680.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,438.28 : 28,204.38 = 11,363.04 : x
  2. Step 2: Convert to fraction form
    20,438.28/28,204.38 = 11,363.04/x
  3. Step 3: Cross multiply
    20,438.28x = 28,204.38 × 11,363.04
  4. Step 4: Simplify right side
    20,438.28x = 320,487,498.12
  5. Step 5: Solve for x
    x = 320,487,498.12/20,438.28
  6. Step 6: Final answer
    x = 15,680.75

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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.