Home / 20,730.90-31,096.35-5,148.53

Finding the Fourth Proportional to 20,730.90, 31,096.35 and 5,148.53

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Solution

The fourth proportional to 20,730.90, 31,096.35 and 5,148.53 is: 7,722.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.90 : 31,096.35 = 5,148.53 : x
  2. Step 2: Convert to fraction form
    20,730.90/31,096.35 = 5,148.53/x
  3. Step 3: Cross multiply
    20,730.90x = 31,096.35 × 5,148.53
  4. Step 4: Simplify right side
    20,730.90x = 160,100,335.38
  5. Step 5: Solve for x
    x = 160,100,335.38/20,730.90
  6. Step 6: Final answer
    x = 7,722.79

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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.