Home / 11,159.76-15,391.68-7,181.28

Finding the Fourth Proportional to 11,159.76, 15,391.68 and 7,181.28

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Solution

The fourth proportional to 11,159.76, 15,391.68 and 7,181.28 is: 9,904.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,159.76 : 15,391.68 = 7,181.28 : x
  2. Step 2: Convert to fraction form
    11,159.76/15,391.68 = 7,181.28/x
  3. Step 3: Cross multiply
    11,159.76x = 15,391.68 × 7,181.28
  4. Step 4: Simplify right side
    11,159.76x = 110,531,963.75
  5. Step 5: Solve for x
    x = 110,531,963.75/11,159.76
  6. Step 6: Final answer
    x = 9,904.51

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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.