Home / 7,972.48-11,959.36-2,778.40

Finding the Fourth Proportional to 7,972.48, 11,959.36 and 2,778.40

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Solution

The fourth proportional to 7,972.48, 11,959.36 and 2,778.40 is: 4,167.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,972.48 : 11,959.36 = 2,778.40 : x
  2. Step 2: Convert to fraction form
    7,972.48/11,959.36 = 2,778.40/x
  3. Step 3: Cross multiply
    7,972.48x = 11,959.36 × 2,778.40
  4. Step 4: Simplify right side
    7,972.48x = 33,227,885.82
  5. Step 5: Solve for x
    x = 33,227,885.82/7,972.48
  6. Step 6: Final answer
    x = 4,167.82

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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.