Home / 20,731.04-31,095.10-5,148.66

Finding the Fourth Proportional to 20,731.04, 31,095.10 and 5,148.66

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Solution

The fourth proportional to 20,731.04, 31,095.10 and 5,148.66 is: 7,722.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.04 : 31,095.10 = 5,148.66 : x
  2. Step 2: Convert to fraction form
    20,731.04/31,095.10 = 5,148.66/x
  3. Step 3: Cross multiply
    20,731.04x = 31,095.10 × 5,148.66
  4. Step 4: Simplify right side
    20,731.04x = 160,098,097.57
  5. Step 5: Solve for x
    x = 160,098,097.57/20,731.04
  6. Step 6: Final answer
    x = 7,722.63

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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.