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Finding the Fourth Proportional to 8,680.88, 11,980.67 and 4,904.21

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Solution

The fourth proportional to 8,680.88, 11,980.67 and 4,904.21 is: 6,768.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,680.88 : 11,980.67 = 4,904.21 : x
  2. Step 2: Convert to fraction form
    8,680.88/11,980.67 = 4,904.21/x
  3. Step 3: Cross multiply
    8,680.88x = 11,980.67 × 4,904.21
  4. Step 4: Simplify right side
    8,680.88x = 58,755,721.62
  5. Step 5: Solve for x
    x = 58,755,721.62/8,680.88
  6. Step 6: Final answer
    x = 6,768.41

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Half scale
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Double scale
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Similar ratio
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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.