Home / 5,423.20-8,116.80-3,938.20

Finding the Fourth Proportional to 5,423.20, 8,116.80 and 3,938.20

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Solution

The fourth proportional to 5,423.20, 8,116.80 and 3,938.20 is: 5,894.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,423.20 : 8,116.80 = 3,938.20 : x
  2. Step 2: Convert to fraction form
    5,423.20/8,116.80 = 3,938.20/x
  3. Step 3: Cross multiply
    5,423.20x = 8,116.80 × 3,938.20
  4. Step 4: Simplify right side
    5,423.20x = 31,965,581.76
  5. Step 5: Solve for x
    x = 31,965,581.76/5,423.20
  6. Step 6: Final answer
    x = 5,894.23

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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.