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Finding the Fourth Proportional to 10,000.85, 15,001.28 and 4,456.85

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Solution

The fourth proportional to 10,000.85, 15,001.28 and 4,456.85 is: 6,685.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,000.85 : 15,001.28 = 4,456.85 : x
  2. Step 2: Convert to fraction form
    10,000.85/15,001.28 = 4,456.85/x
  3. Step 3: Cross multiply
    10,000.85x = 15,001.28 × 4,456.85
  4. Step 4: Simplify right side
    10,000.85x = 66,858,432.48
  5. Step 5: Solve for x
    x = 66,858,432.48/10,000.85
  6. Step 6: Final answer
    x = 6,685.28

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Half scale
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Double scale
Find fourth proportional to 10,001.85, 15,002.78 and 4,457.85
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.