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Finding the Fourth Proportional to 6,630.49, 9,945.75 and 3,117.93

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Solution

The fourth proportional to 6,630.49, 9,945.75 and 3,117.93 is: 4,676.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,630.49 : 9,945.75 = 3,117.93 : x
  2. Step 2: Convert to fraction form
    6,630.49/9,945.75 = 3,117.93/x
  3. Step 3: Cross multiply
    6,630.49x = 9,945.75 × 3,117.93
  4. Step 4: Simplify right side
    6,630.49x = 31,010,152.30
  5. Step 5: Solve for x
    x = 31,010,152.30/6,630.49
  6. Step 6: Final answer
    x = 4,676.90

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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.