Home / 71,211.76-106,818-18,621.36

Finding the Fourth Proportional to 71,211.76, 106,818 and 18,621.36

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Solution

The fourth proportional to 71,211.76, 106,818 and 18,621.36 is: 27,932.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,211.76 : 106,818 = 18,621.36 : x
  2. Step 2: Convert to fraction form
    71,211.76/106,818 = 18,621.36/x
  3. Step 3: Cross multiply
    71,211.76x = 106,818 × 18,621.36
  4. Step 4: Simplify right side
    71,211.76x = 1,989,096,432.48
  5. Step 5: Solve for x
    x = 1,989,096,432.48/71,211.76
  6. Step 6: Final answer
    x = 27,932.13

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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.