Home / 7,621.40-11,429.20-2,690.12

Finding the Fourth Proportional to 7,621.40, 11,429.20 and 2,690.12

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Solution

The fourth proportional to 7,621.40, 11,429.20 and 2,690.12 is: 4,034.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,621.40 : 11,429.20 = 2,690.12 : x
  2. Step 2: Convert to fraction form
    7,621.40/11,429.20 = 2,690.12/x
  3. Step 3: Cross multiply
    7,621.40x = 11,429.20 × 2,690.12
  4. Step 4: Simplify right side
    7,621.40x = 30,745,919.50
  5. Step 5: Solve for x
    x = 30,745,919.50/7,621.40
  6. Step 6: Final answer
    x = 4,034.16

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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.