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Finding the Fourth Proportional to 6,800.76, 9,387.39 and 4,287.11

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Solution

The fourth proportional to 6,800.76, 9,387.39 and 4,287.11 is: 5,917.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,800.76 : 9,387.39 = 4,287.11 : x
  2. Step 2: Convert to fraction form
    6,800.76/9,387.39 = 4,287.11/x
  3. Step 3: Cross multiply
    6,800.76x = 9,387.39 × 4,287.11
  4. Step 4: Simplify right side
    6,800.76x = 40,244,726.61
  5. Step 5: Solve for x
    x = 40,244,726.61/6,800.76
  6. Step 6: Final answer
    x = 5,917.68

Related Problems

Find fourth proportional to 3,400.38, 4,693.70 and 2,143.55
Half scale
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Double scale
Find fourth proportional to 6,801.76, 9,388.77 and 4,288.11
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.