Home / 8,621.18-12,929.27-3,938.70

Finding the Fourth Proportional to 8,621.18, 12,929.27 and 3,938.70

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Solution

The fourth proportional to 8,621.18, 12,929.27 and 3,938.70 is: 5,906.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,621.18 : 12,929.27 = 3,938.70 : x
  2. Step 2: Convert to fraction form
    8,621.18/12,929.27 = 3,938.70/x
  3. Step 3: Cross multiply
    8,621.18x = 12,929.27 × 3,938.70
  4. Step 4: Simplify right side
    8,621.18x = 50,924,515.75
  5. Step 5: Solve for x
    x = 50,924,515.75/8,621.18
  6. Step 6: Final answer
    x = 5,906.91

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1.5x scale

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.