Home / 20,455.32-28,229.28-11,502.72

Finding the Fourth Proportional to 20,455.32, 28,229.28 and 11,502.72

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Solution

The fourth proportional to 20,455.32, 28,229.28 and 11,502.72 is: 15,874.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,455.32 : 28,229.28 = 11,502.72 : x
  2. Step 2: Convert to fraction form
    20,455.32/28,229.28 = 11,502.72/x
  3. Step 3: Cross multiply
    20,455.32x = 28,229.28 × 11,502.72
  4. Step 4: Simplify right side
    20,455.32x = 324,713,503.64
  5. Step 5: Solve for x
    x = 324,713,503.64/20,455.32
  6. Step 6: Final answer
    x = 15,874.28

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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.