Home / 20,972.22-28,941-11,540.76

Finding the Fourth Proportional to 20,972.22, 28,941 and 11,540.76

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Solution

The fourth proportional to 20,972.22, 28,941 and 11,540.76 is: 15,925.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.22 : 28,941 = 11,540.76 : x
  2. Step 2: Convert to fraction form
    20,972.22/28,941 = 11,540.76/x
  3. Step 3: Cross multiply
    20,972.22x = 28,941 × 11,540.76
  4. Step 4: Simplify right side
    20,972.22x = 334,001,135.16
  5. Step 5: Solve for x
    x = 334,001,135.16/20,972.22
  6. Step 6: Final answer
    x = 15,925.88

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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.