Home / 21,171.23-29,220.10-12,217.49

Finding the Fourth Proportional to 21,171.23, 29,220.10 and 12,217.49

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Solution

The fourth proportional to 21,171.23, 29,220.10 and 12,217.49 is: 16,862.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,171.23 : 29,220.10 = 12,217.49 : x
  2. Step 2: Convert to fraction form
    21,171.23/29,220.10 = 12,217.49/x
  3. Step 3: Cross multiply
    21,171.23x = 29,220.10 × 12,217.49
  4. Step 4: Simplify right side
    21,171.23x = 356,996,102.90
  5. Step 5: Solve for x
    x = 356,996,102.90/21,171.23
  6. Step 6: Final answer
    x = 16,862.33

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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.