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Finding the Fourth Proportional to 10,612.36, 15,903.73 and 7,976.78

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Solution

The fourth proportional to 10,612.36, 15,903.73 and 7,976.78 is: 11,954.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,612.36 : 15,903.73 = 7,976.78 : x
  2. Step 2: Convert to fraction form
    10,612.36/15,903.73 = 7,976.78/x
  3. Step 3: Cross multiply
    10,612.36x = 15,903.73 × 7,976.78
  4. Step 4: Simplify right side
    10,612.36x = 126,860,555.39
  5. Step 5: Solve for x
    x = 126,860,555.39/10,612.36
  6. Step 6: Final answer
    x = 11,954.04

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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.