Home / 21,543.36-29,731.29-12,112.56

Finding the Fourth Proportional to 21,543.36, 29,731.29 and 12,112.56

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Solution

The fourth proportional to 21,543.36, 29,731.29 and 12,112.56 is: 16,716.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,543.36 : 29,731.29 = 12,112.56 : x
  2. Step 2: Convert to fraction form
    21,543.36/29,731.29 = 12,112.56/x
  3. Step 3: Cross multiply
    21,543.36x = 29,731.29 × 12,112.56
  4. Step 4: Simplify right side
    21,543.36x = 360,122,034.00
  5. Step 5: Solve for x
    x = 360,122,034.00/21,543.36
  6. Step 6: Final answer
    x = 16,716.15

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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.