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Finding the Fourth Proportional to 6,915.30, 10,373.02 and 1,721.18

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Solution

The fourth proportional to 6,915.30, 10,373.02 and 1,721.18 is: 2,581.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,915.30 : 10,373.02 = 1,721.18 : x
  2. Step 2: Convert to fraction form
    6,915.30/10,373.02 = 1,721.18/x
  3. Step 3: Cross multiply
    6,915.30x = 10,373.02 × 1,721.18
  4. Step 4: Simplify right side
    6,915.30x = 17,853,782.70
  5. Step 5: Solve for x
    x = 17,853,782.70/6,915.30
  6. Step 6: Final answer
    x = 2,581.78

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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.