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Finding the Fourth Proportional to 11,120, 15,338.31 and 7,134.80

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Solution

The fourth proportional to 11,120, 15,338.31 and 7,134.80 is: 9,841.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,120 : 15,338.31 = 7,134.80 : x
  2. Step 2: Convert to fraction form
    11,120/15,338.31 = 7,134.80/x
  3. Step 3: Cross multiply
    11,120x = 15,338.31 × 7,134.80
  4. Step 4: Simplify right side
    11,120x = 109,435,774.19
  5. Step 5: Solve for x
    x = 109,435,774.19/11,120
  6. Step 6: Final answer
    x = 9,841.35

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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.