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Finding the Fourth Proportional to 21,540.71, 32,311.08 and 6,750.78

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Solution

The fourth proportional to 21,540.71, 32,311.08 and 6,750.78 is: 10,126.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,540.71 : 32,311.08 = 6,750.78 : x
  2. Step 2: Convert to fraction form
    21,540.71/32,311.08 = 6,750.78/x
  3. Step 3: Cross multiply
    21,540.71x = 32,311.08 × 6,750.78
  4. Step 4: Simplify right side
    21,540.71x = 218,125,053.23
  5. Step 5: Solve for x
    x = 218,125,053.23/21,540.71
  6. Step 6: Final answer
    x = 10,126.18

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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.