Home / 21,143.97-29,192.14-13,197.87

Finding the Fourth Proportional to 21,143.97, 29,192.14 and 13,197.87

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Solution

The fourth proportional to 21,143.97, 29,192.14 and 13,197.87 is: 18,221.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.97 : 29,192.14 = 13,197.87 : x
  2. Step 2: Convert to fraction form
    21,143.97/29,192.14 = 13,197.87/x
  3. Step 3: Cross multiply
    21,143.97x = 29,192.14 × 13,197.87
  4. Step 4: Simplify right side
    21,143.97x = 385,274,068.74
  5. Step 5: Solve for x
    x = 385,274,068.74/21,143.97
  6. Step 6: Final answer
    x = 18,221.46

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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.