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Finding the Fourth Proportional to 10,542.90, 15,820.92 and 3,968.22

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Solution

The fourth proportional to 10,542.90, 15,820.92 and 3,968.22 is: 5,954.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,542.90 : 15,820.92 = 3,968.22 : x
  2. Step 2: Convert to fraction form
    10,542.90/15,820.92 = 3,968.22/x
  3. Step 3: Cross multiply
    10,542.90x = 15,820.92 × 3,968.22
  4. Step 4: Simplify right side
    10,542.90x = 62,780,891.16
  5. Step 5: Solve for x
    x = 62,780,891.16/10,542.90
  6. Step 6: Final answer
    x = 5,954.80

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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.