Home / 20,630.64-28,470.36-11,199.21

Finding the Fourth Proportional to 20,630.64, 28,470.36 and 11,199.21

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Solution

The fourth proportional to 20,630.64, 28,470.36 and 11,199.21 is: 15,454.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.64 : 28,470.36 = 11,199.21 : x
  2. Step 2: Convert to fraction form
    20,630.64/28,470.36 = 11,199.21/x
  3. Step 3: Cross multiply
    20,630.64x = 28,470.36 × 11,199.21
  4. Step 4: Simplify right side
    20,630.64x = 318,845,540.42
  5. Step 5: Solve for x
    x = 318,845,540.42/20,630.64
  6. Step 6: Final answer
    x = 15,454.95

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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.