Home / 21,273.72-29,331.18-13,707

Finding the Fourth Proportional to 21,273.72, 29,331.18 and 13,707

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Solution

The fourth proportional to 21,273.72, 29,331.18 and 13,707 is: 18,898.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,273.72 : 29,331.18 = 13,707 : x
  2. Step 2: Convert to fraction form
    21,273.72/29,331.18 = 13,707/x
  3. Step 3: Cross multiply
    21,273.72x = 29,331.18 × 13,707
  4. Step 4: Simplify right side
    21,273.72x = 402,042,484.26
  5. Step 5: Solve for x
    x = 402,042,484.26/21,273.72
  6. Step 6: Final answer
    x = 18,898.55

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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.