Home / 8,728.87-12,042.78-5,191.60

Finding the Fourth Proportional to 8,728.87, 12,042.78 and 5,191.60

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Solution

The fourth proportional to 8,728.87, 12,042.78 and 5,191.60 is: 7,162.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,728.87 : 12,042.78 = 5,191.60 : x
  2. Step 2: Convert to fraction form
    8,728.87/12,042.78 = 5,191.60/x
  3. Step 3: Cross multiply
    8,728.87x = 12,042.78 × 5,191.60
  4. Step 4: Simplify right side
    8,728.87x = 62,521,296.65
  5. Step 5: Solve for x
    x = 62,521,296.65/8,728.87
  6. Step 6: Final answer
    x = 7,162.59

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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.