Home / 13,278.40-19,917.60-12,695.20

Finding the Fourth Proportional to 13,278.40, 19,917.60 and 12,695.20

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Solution

The fourth proportional to 13,278.40, 19,917.60 and 12,695.20 is: 19,042.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,278.40 : 19,917.60 = 12,695.20 : x
  2. Step 2: Convert to fraction form
    13,278.40/19,917.60 = 12,695.20/x
  3. Step 3: Cross multiply
    13,278.40x = 19,917.60 × 12,695.20
  4. Step 4: Simplify right side
    13,278.40x = 252,857,915.52
  5. Step 5: Solve for x
    x = 252,857,915.52/13,278.40
  6. Step 6: Final answer
    x = 19,042.80

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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.