Home / 5,278.17-7,915.89-1,989.48

Finding the Fourth Proportional to 5,278.17, 7,915.89 and 1,989.48

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Solution

The fourth proportional to 5,278.17, 7,915.89 and 1,989.48 is: 2,983.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,278.17 : 7,915.89 = 1,989.48 : x
  2. Step 2: Convert to fraction form
    5,278.17/7,915.89 = 1,989.48/x
  3. Step 3: Cross multiply
    5,278.17x = 7,915.89 × 1,989.48
  4. Step 4: Simplify right side
    5,278.17x = 15,748,504.84
  5. Step 5: Solve for x
    x = 15,748,504.84/5,278.17
  6. Step 6: Final answer
    x = 2,983.71

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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.