Home / 7,943.20-11,915.30-2,678.74

Finding the Fourth Proportional to 7,943.20, 11,915.30 and 2,678.74

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Solution

The fourth proportional to 7,943.20, 11,915.30 and 2,678.74 is: 4,018.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,943.20 : 11,915.30 = 2,678.74 : x
  2. Step 2: Convert to fraction form
    7,943.20/11,915.30 = 2,678.74/x
  3. Step 3: Cross multiply
    7,943.20x = 11,915.30 × 2,678.74
  4. Step 4: Simplify right side
    7,943.20x = 31,917,967.63
  5. Step 5: Solve for x
    x = 31,917,967.63/7,943.20
  6. Step 6: Final answer
    x = 4,018.28

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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.