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Finding the Fourth Proportional to 6,665.79, 9,998.65 and 6,259.85

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Solution

The fourth proportional to 6,665.79, 9,998.65 and 6,259.85 is: 9,389.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,665.79 : 9,998.65 = 6,259.85 : x
  2. Step 2: Convert to fraction form
    6,665.79/9,998.65 = 6,259.85/x
  3. Step 3: Cross multiply
    6,665.79x = 9,998.65 × 6,259.85
  4. Step 4: Simplify right side
    6,665.79x = 62,590,049.20
  5. Step 5: Solve for x
    x = 62,590,049.20/6,665.79
  6. Step 6: Final answer
    x = 9,389.74

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.