Home / 21,531.12-29,713.62-13,034.80

Finding the Fourth Proportional to 21,531.12, 29,713.62 and 13,034.80

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Solution

The fourth proportional to 21,531.12, 29,713.62 and 13,034.80 is: 17,988.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,531.12 : 29,713.62 = 13,034.80 : x
  2. Step 2: Convert to fraction form
    21,531.12/29,713.62 = 13,034.80/x
  3. Step 3: Cross multiply
    21,531.12x = 29,713.62 × 13,034.80
  4. Step 4: Simplify right side
    21,531.12x = 387,311,093.98
  5. Step 5: Solve for x
    x = 387,311,093.98/21,531.12
  6. Step 6: Final answer
    x = 17,988.43

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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.