Home / 20,829.16-28,744.24-11,397.72

Finding the Fourth Proportional to 20,829.16, 28,744.24 and 11,397.72

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Solution

The fourth proportional to 20,829.16, 28,744.24 and 11,397.72 is: 15,728.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,829.16 : 28,744.24 = 11,397.72 : x
  2. Step 2: Convert to fraction form
    20,829.16/28,744.24 = 11,397.72/x
  3. Step 3: Cross multiply
    20,829.16x = 28,744.24 × 11,397.72
  4. Step 4: Simplify right side
    20,829.16x = 327,618,799.13
  5. Step 5: Solve for x
    x = 327,618,799.13/20,829.16
  6. Step 6: Final answer
    x = 15,728.85

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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.