Home / 21,543.47-29,731.35-12,112.64

Finding the Fourth Proportional to 21,543.47, 29,731.35 and 12,112.64

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Solution

The fourth proportional to 21,543.47, 29,731.35 and 12,112.64 is: 16,716.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,543.47 : 29,731.35 = 12,112.64 : x
  2. Step 2: Convert to fraction form
    21,543.47/29,731.35 = 12,112.64/x
  3. Step 3: Cross multiply
    21,543.47x = 29,731.35 × 12,112.64
  4. Step 4: Simplify right side
    21,543.47x = 360,124,990.61
  5. Step 5: Solve for x
    x = 360,124,990.61/21,543.47
  6. Step 6: Final answer
    x = 16,716.21

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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.