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Finding the Fourth Proportional to 9,938.70, 14,908.05 and 8,189.10

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Solution

The fourth proportional to 9,938.70, 14,908.05 and 8,189.10 is: 12,283.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,938.70 : 14,908.05 = 8,189.10 : x
  2. Step 2: Convert to fraction form
    9,938.70/14,908.05 = 8,189.10/x
  3. Step 3: Cross multiply
    9,938.70x = 14,908.05 × 8,189.10
  4. Step 4: Simplify right side
    9,938.70x = 122,083,512.26
  5. Step 5: Solve for x
    x = 122,083,512.26/9,938.70
  6. Step 6: Final answer
    x = 12,283.65

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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.