Home / 15,115.64-22,648.86-11,978.72

Finding the Fourth Proportional to 15,115.64, 22,648.86 and 11,978.72

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Solution

The fourth proportional to 15,115.64, 22,648.86 and 11,978.72 is: 17,948.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,115.64 : 22,648.86 = 11,978.72 : x
  2. Step 2: Convert to fraction form
    15,115.64/22,648.86 = 11,978.72/x
  3. Step 3: Cross multiply
    15,115.64x = 22,648.86 × 11,978.72
  4. Step 4: Simplify right side
    15,115.64x = 271,304,352.26
  5. Step 5: Solve for x
    x = 271,304,352.26/15,115.64
  6. Step 6: Final answer
    x = 17,948.59

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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.