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Finding the Fourth Proportional to 11,355.70, 15,671.24 and 7,105.41

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Solution

The fourth proportional to 11,355.70, 15,671.24 and 7,105.41 is: 9,805.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,355.70 : 15,671.24 = 7,105.41 : x
  2. Step 2: Convert to fraction form
    11,355.70/15,671.24 = 7,105.41/x
  3. Step 3: Cross multiply
    11,355.70x = 15,671.24 × 7,105.41
  4. Step 4: Simplify right side
    11,355.70x = 111,350,585.41
  5. Step 5: Solve for x
    x = 111,350,585.41/11,355.70
  6. Step 6: Final answer
    x = 9,805.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.