Home / 3,219.60-4,821.90-3,130.92

Finding the Fourth Proportional to 3,219.60, 4,821.90 and 3,130.92

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Solution

The fourth proportional to 3,219.60, 4,821.90 and 3,130.92 is: 4,689.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,219.60 : 4,821.90 = 3,130.92 : x
  2. Step 2: Convert to fraction form
    3,219.60/4,821.90 = 3,130.92/x
  3. Step 3: Cross multiply
    3,219.60x = 4,821.90 × 3,130.92
  4. Step 4: Simplify right side
    3,219.60x = 15,096,983.15
  5. Step 5: Solve for x
    x = 15,096,983.15/3,219.60
  6. Step 6: Final answer
    x = 4,689.09

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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.