Home / 5,678.10-8,517.78-1,981.62

Finding the Fourth Proportional to 5,678.10, 8,517.78 and 1,981.62

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Solution

The fourth proportional to 5,678.10, 8,517.78 and 1,981.62 is: 2,972.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,678.10 : 8,517.78 = 1,981.62 : x
  2. Step 2: Convert to fraction form
    5,678.10/8,517.78 = 1,981.62/x
  3. Step 3: Cross multiply
    5,678.10x = 8,517.78 × 1,981.62
  4. Step 4: Simplify right side
    5,678.10x = 16,879,003.20
  5. Step 5: Solve for x
    x = 16,879,003.20/5,678.10
  6. Step 6: Final answer
    x = 2,972.65

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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.