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Finding the Fourth Proportional to 12,915.08, 17,818.74 and 7,608.20

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Solution

The fourth proportional to 12,915.08, 17,818.74 and 7,608.20 is: 10,496.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,915.08 : 17,818.74 = 7,608.20 : x
  2. Step 2: Convert to fraction form
    12,915.08/17,818.74 = 7,608.20/x
  3. Step 3: Cross multiply
    12,915.08x = 17,818.74 × 7,608.20
  4. Step 4: Simplify right side
    12,915.08x = 135,568,537.67
  5. Step 5: Solve for x
    x = 135,568,537.67/12,915.08
  6. Step 6: Final answer
    x = 10,496.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.