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Finding the Fourth Proportional to 21,951.20, 32,926.80 and 21,805.40

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Solution

The fourth proportional to 21,951.20, 32,926.80 and 21,805.40 is: 32,708.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,951.20 : 32,926.80 = 21,805.40 : x
  2. Step 2: Convert to fraction form
    21,951.20/32,926.80 = 21,805.40/x
  3. Step 3: Cross multiply
    21,951.20x = 32,926.80 × 21,805.40
  4. Step 4: Simplify right side
    21,951.20x = 717,982,044.72
  5. Step 5: Solve for x
    x = 717,982,044.72/21,951.20
  6. Step 6: Final answer
    x = 32,708.10

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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.