Home / 8,287.60-11,431.68-5,455.12

Finding the Fourth Proportional to 8,287.60, 11,431.68 and 5,455.12

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Solution

The fourth proportional to 8,287.60, 11,431.68 and 5,455.12 is: 7,524.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,287.60 : 11,431.68 = 5,455.12 : x
  2. Step 2: Convert to fraction form
    8,287.60/11,431.68 = 5,455.12/x
  3. Step 3: Cross multiply
    8,287.60x = 11,431.68 × 5,455.12
  4. Step 4: Simplify right side
    8,287.60x = 62,361,186.20
  5. Step 5: Solve for x
    x = 62,361,186.20/8,287.60
  6. Step 6: Final answer
    x = 7,524.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.