Home / 21,148.80-29,172.13-13,604.97

Finding the Fourth Proportional to 21,148.80, 29,172.13 and 13,604.97

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Solution

The fourth proportional to 21,148.80, 29,172.13 and 13,604.97 is: 18,766.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,148.80 : 29,172.13 = 13,604.97 : x
  2. Step 2: Convert to fraction form
    21,148.80/29,172.13 = 13,604.97/x
  3. Step 3: Cross multiply
    21,148.80x = 29,172.13 × 13,604.97
  4. Step 4: Simplify right side
    21,148.80x = 396,885,953.49
  5. Step 5: Solve for x
    x = 396,885,953.49/21,148.80
  6. Step 6: Final answer
    x = 18,766.36

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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.