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Finding the Fourth Proportional to 21,630.11, 32,445.36 and 6,839.10

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Solution

The fourth proportional to 21,630.11, 32,445.36 and 6,839.10 is: 10,258.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,630.11 : 32,445.36 = 6,839.10 : x
  2. Step 2: Convert to fraction form
    21,630.11/32,445.36 = 6,839.10/x
  3. Step 3: Cross multiply
    21,630.11x = 32,445.36 × 6,839.10
  4. Step 4: Simplify right side
    21,630.11x = 221,897,061.58
  5. Step 5: Solve for x
    x = 221,897,061.58/21,630.11
  6. Step 6: Final answer
    x = 10,258.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.