Home / 21,549.48-29,728.86-13,161

Finding the Fourth Proportional to 21,549.48, 29,728.86 and 13,161

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Solution

The fourth proportional to 21,549.48, 29,728.86 and 13,161 is: 18,156.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,549.48 : 29,728.86 = 13,161 : x
  2. Step 2: Convert to fraction form
    21,549.48/29,728.86 = 13,161/x
  3. Step 3: Cross multiply
    21,549.48x = 29,728.86 × 13,161
  4. Step 4: Simplify right side
    21,549.48x = 391,261,526.46
  5. Step 5: Solve for x
    x = 391,261,526.46/21,549.48
  6. Step 6: Final answer
    x = 18,156.43

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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.