Home / 21,149.04-29,172.48-13,605.20

Finding the Fourth Proportional to 21,149.04, 29,172.48 and 13,605.20

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Solution

The fourth proportional to 21,149.04, 29,172.48 and 13,605.20 is: 18,766.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,149.04 : 29,172.48 = 13,605.20 : x
  2. Step 2: Convert to fraction form
    21,149.04/29,172.48 = 13,605.20/x
  3. Step 3: Cross multiply
    21,149.04x = 29,172.48 × 13,605.20
  4. Step 4: Simplify right side
    21,149.04x = 396,897,424.90
  5. Step 5: Solve for x
    x = 396,897,424.90/21,149.04
  6. Step 6: Final answer
    x = 18,766.69

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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.