Home / 7,145.60-10,718.40-6,121.60

Finding the Fourth Proportional to 7,145.60, 10,718.40 and 6,121.60

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Solution

The fourth proportional to 7,145.60, 10,718.40 and 6,121.60 is: 9,182.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,145.60 : 10,718.40 = 6,121.60 : x
  2. Step 2: Convert to fraction form
    7,145.60/10,718.40 = 6,121.60/x
  3. Step 3: Cross multiply
    7,145.60x = 10,718.40 × 6,121.60
  4. Step 4: Simplify right side
    7,145.60x = 65,613,757.44
  5. Step 5: Solve for x
    x = 65,613,757.44/7,145.60
  6. Step 6: Final answer
    x = 9,182.40

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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.