Home / 8,319.24-12,449.88-5,155.20

Finding the Fourth Proportional to 8,319.24, 12,449.88 and 5,155.20

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Solution

The fourth proportional to 8,319.24, 12,449.88 and 5,155.20 is: 7,714.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,319.24 : 12,449.88 = 5,155.20 : x
  2. Step 2: Convert to fraction form
    8,319.24/12,449.88 = 5,155.20/x
  3. Step 3: Cross multiply
    8,319.24x = 12,449.88 × 5,155.20
  4. Step 4: Simplify right side
    8,319.24x = 64,181,621.38
  5. Step 5: Solve for x
    x = 64,181,621.38/8,319.24
  6. Step 6: Final answer
    x = 7,714.84

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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.