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Finding the Fourth Proportional to 6,915.28, 10,372.93 and 1,721.16

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Solution

The fourth proportional to 6,915.28, 10,372.93 and 1,721.16 is: 2,581.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,915.28 : 10,372.93 = 1,721.16 : x
  2. Step 2: Convert to fraction form
    6,915.28/10,372.93 = 1,721.16/x
  3. Step 3: Cross multiply
    6,915.28x = 10,372.93 × 1,721.16
  4. Step 4: Simplify right side
    6,915.28x = 17,853,472.20
  5. Step 5: Solve for x
    x = 17,853,472.20/6,915.28
  6. Step 6: Final answer
    x = 2,581.74

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Similar ratio
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1.5x scale

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.