Home / 8,680.20-12,998.16-4,780.32

Finding the Fourth Proportional to 8,680.20, 12,998.16 and 4,780.32

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Solution

The fourth proportional to 8,680.20, 12,998.16 and 4,780.32 is: 7,158.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,680.20 : 12,998.16 = 4,780.32 : x
  2. Step 2: Convert to fraction form
    8,680.20/12,998.16 = 4,780.32/x
  3. Step 3: Cross multiply
    8,680.20x = 12,998.16 × 4,780.32
  4. Step 4: Simplify right side
    8,680.20x = 62,135,364.21
  5. Step 5: Solve for x
    x = 62,135,364.21/8,680.20
  6. Step 6: Final answer
    x = 7,158.29

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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.