Home / 20,731.16-31,095.29-5,148.79

Finding the Fourth Proportional to 20,731.16, 31,095.29 and 5,148.79

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Solution

The fourth proportional to 20,731.16, 31,095.29 and 5,148.79 is: 7,722.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.16 : 31,095.29 = 5,148.79 : x
  2. Step 2: Convert to fraction form
    20,731.16/31,095.29 = 5,148.79/x
  3. Step 3: Cross multiply
    20,731.16x = 31,095.29 × 5,148.79
  4. Step 4: Simplify right side
    20,731.16x = 160,103,053.33
  5. Step 5: Solve for x
    x = 160,103,053.33/20,731.16
  6. Step 6: Final answer
    x = 7,722.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.