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Finding the Fourth Proportional to 8,118.65, 11,203.77 and 4,974.77

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Solution

The fourth proportional to 8,118.65, 11,203.77 and 4,974.77 is: 6,865.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,118.65 : 11,203.77 = 4,974.77 : x
  2. Step 2: Convert to fraction form
    8,118.65/11,203.77 = 4,974.77/x
  3. Step 3: Cross multiply
    8,118.65x = 11,203.77 × 4,974.77
  4. Step 4: Simplify right side
    8,118.65x = 55,736,122.86
  5. Step 5: Solve for x
    x = 55,736,122.86/8,118.65
  6. Step 6: Final answer
    x = 6,865.20

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Double scale
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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.