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Finding the Fourth Proportional to 11,699.40, 17,543.70 and 5,122.20

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Solution

The fourth proportional to 11,699.40, 17,543.70 and 5,122.20 is: 7,680.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,699.40 : 17,543.70 = 5,122.20 : x
  2. Step 2: Convert to fraction form
    11,699.40/17,543.70 = 5,122.20/x
  3. Step 3: Cross multiply
    11,699.40x = 17,543.70 × 5,122.20
  4. Step 4: Simplify right side
    11,699.40x = 89,862,340.14
  5. Step 5: Solve for x
    x = 89,862,340.14/11,699.40
  6. Step 6: Final answer
    x = 7,680.94

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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.