Home / 8,581.12-11,847.68-5,785.60

Finding the Fourth Proportional to 8,581.12, 11,847.68 and 5,785.60

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Solution

The fourth proportional to 8,581.12, 11,847.68 and 5,785.60 is: 7,987.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,581.12 : 11,847.68 = 5,785.60 : x
  2. Step 2: Convert to fraction form
    8,581.12/11,847.68 = 5,785.60/x
  3. Step 3: Cross multiply
    8,581.12x = 11,847.68 × 5,785.60
  4. Step 4: Simplify right side
    8,581.12x = 68,545,937.41
  5. Step 5: Solve for x
    x = 68,545,937.41/8,581.12
  6. Step 6: Final answer
    x = 7,987.99

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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.