Home / 4,752.20-7,121.10-3,211.40

Finding the Fourth Proportional to 4,752.20, 7,121.10 and 3,211.40

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Solution

The fourth proportional to 4,752.20, 7,121.10 and 3,211.40 is: 4,812.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,752.20 : 7,121.10 = 3,211.40 : x
  2. Step 2: Convert to fraction form
    4,752.20/7,121.10 = 3,211.40/x
  3. Step 3: Cross multiply
    4,752.20x = 7,121.10 × 3,211.40
  4. Step 4: Simplify right side
    4,752.20x = 22,868,700.54
  5. Step 5: Solve for x
    x = 22,868,700.54/4,752.20
  6. Step 6: Final answer
    x = 4,812.23

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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.