Home / 7,621.60-11,431.92-2,431.20

Finding the Fourth Proportional to 7,621.60, 11,431.92 and 2,431.20

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Solution

The fourth proportional to 7,621.60, 11,431.92 and 2,431.20 is: 3,646.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,621.60 : 11,431.92 = 2,431.20 : x
  2. Step 2: Convert to fraction form
    7,621.60/11,431.92 = 2,431.20/x
  3. Step 3: Cross multiply
    7,621.60x = 11,431.92 × 2,431.20
  4. Step 4: Simplify right side
    7,621.60x = 27,793,283.90
  5. Step 5: Solve for x
    x = 27,793,283.90/7,621.60
  6. Step 6: Final answer
    x = 3,646.65

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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.