Home / 31,318.93-43,222.13-20,689.93

Finding the Fourth Proportional to 31,318.93, 43,222.13 and 20,689.93

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Solution

The fourth proportional to 31,318.93, 43,222.13 and 20,689.93 is: 28,553.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,318.93 : 43,222.13 = 20,689.93 : x
  2. Step 2: Convert to fraction form
    31,318.93/43,222.13 = 20,689.93/x
  3. Step 3: Cross multiply
    31,318.93x = 43,222.13 × 20,689.93
  4. Step 4: Simplify right side
    31,318.93x = 894,262,844.15
  5. Step 5: Solve for x
    x = 894,262,844.15/31,318.93
  6. Step 6: Final answer
    x = 28,553.43

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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.