Home / 20,939.98-28,889.19-15,502

Finding the Fourth Proportional to 20,939.98, 28,889.19 and 15,502

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Solution

The fourth proportional to 20,939.98, 28,889.19 and 15,502 is: 21,386.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.98 : 28,889.19 = 15,502 : x
  2. Step 2: Convert to fraction form
    20,939.98/28,889.19 = 15,502/x
  3. Step 3: Cross multiply
    20,939.98x = 28,889.19 × 15,502
  4. Step 4: Simplify right side
    20,939.98x = 447,840,223.38
  5. Step 5: Solve for x
    x = 447,840,223.38/20,939.98
  6. Step 6: Final answer
    x = 21,386.85

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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.