Home / 21,148.76-29,172.02-13,604.90

Finding the Fourth Proportional to 21,148.76, 29,172.02 and 13,604.90

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Solution

The fourth proportional to 21,148.76, 29,172.02 and 13,604.90 is: 18,766.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,148.76 : 29,172.02 = 13,604.90 : x
  2. Step 2: Convert to fraction form
    21,148.76/29,172.02 = 13,604.90/x
  3. Step 3: Cross multiply
    21,148.76x = 29,172.02 × 13,604.90
  4. Step 4: Simplify right side
    21,148.76x = 396,882,201.01
  5. Step 5: Solve for x
    x = 396,882,201.01/21,148.76
  6. Step 6: Final answer
    x = 18,766.21

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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.