Home / 8,788.12-12,120.76-5,644.60

Finding the Fourth Proportional to 8,788.12, 12,120.76 and 5,644.60

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Solution

The fourth proportional to 8,788.12, 12,120.76 and 5,644.60 is: 7,785.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,788.12 : 12,120.76 = 5,644.60 : x
  2. Step 2: Convert to fraction form
    8,788.12/12,120.76 = 5,644.60/x
  3. Step 3: Cross multiply
    8,788.12x = 12,120.76 × 5,644.60
  4. Step 4: Simplify right side
    8,788.12x = 68,416,841.90
  5. Step 5: Solve for x
    x = 68,416,841.90/8,788.12
  6. Step 6: Final answer
    x = 7,785.15

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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.