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Finding the Fourth Proportional to 11,491.40, 17,237.10 and 7,117.40

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Solution

The fourth proportional to 11,491.40, 17,237.10 and 7,117.40 is: 10,676.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,491.40 : 17,237.10 = 7,117.40 : x
  2. Step 2: Convert to fraction form
    11,491.40/17,237.10 = 7,117.40/x
  3. Step 3: Cross multiply
    11,491.40x = 17,237.10 × 7,117.40
  4. Step 4: Simplify right side
    11,491.40x = 122,683,335.54
  5. Step 5: Solve for x
    x = 122,683,335.54/11,491.40
  6. Step 6: Final answer
    x = 10,676.10

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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.