Home / 11,121.10-15,342.48-7,291.69

Finding the Fourth Proportional to 11,121.10, 15,342.48 and 7,291.69

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Solution

The fourth proportional to 11,121.10, 15,342.48 and 7,291.69 is: 10,059.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,121.10 : 15,342.48 = 7,291.69 : x
  2. Step 2: Convert to fraction form
    11,121.10/15,342.48 = 7,291.69/x
  3. Step 3: Cross multiply
    11,121.10x = 15,342.48 × 7,291.69
  4. Step 4: Simplify right side
    11,121.10x = 111,872,569.64
  5. Step 5: Solve for x
    x = 111,872,569.64/11,121.10
  6. Step 6: Final answer
    x = 10,059.49

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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.