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Finding the Fourth Proportional to 10,100.10, 15,150.15 and 6,989.70

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Solution

The fourth proportional to 10,100.10, 15,150.15 and 6,989.70 is: 10,484.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,100.10 : 15,150.15 = 6,989.70 : x
  2. Step 2: Convert to fraction form
    10,100.10/15,150.15 = 6,989.70/x
  3. Step 3: Cross multiply
    10,100.10x = 15,150.15 × 6,989.70
  4. Step 4: Simplify right side
    10,100.10x = 105,895,003.46
  5. Step 5: Solve for x
    x = 105,895,003.46/10,100.10
  6. Step 6: Final answer
    x = 10,484.55

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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.