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Finding the Fourth Proportional to 6,991.84, 10,487.76 and 6,641.48

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Solution

The fourth proportional to 6,991.84, 10,487.76 and 6,641.48 is: 9,962.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,991.84 : 10,487.76 = 6,641.48 : x
  2. Step 2: Convert to fraction form
    6,991.84/10,487.76 = 6,641.48/x
  3. Step 3: Cross multiply
    6,991.84x = 10,487.76 × 6,641.48
  4. Step 4: Simplify right side
    6,991.84x = 69,654,248.28
  5. Step 5: Solve for x
    x = 69,654,248.28/6,991.84
  6. Step 6: Final answer
    x = 9,962.22

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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.