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Finding the Fourth Proportional to 8,608.78, 12,915.21 and 4,663.98

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Solution

The fourth proportional to 8,608.78, 12,915.21 and 4,663.98 is: 6,997.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,608.78 : 12,915.21 = 4,663.98 : x
  2. Step 2: Convert to fraction form
    8,608.78/12,915.21 = 4,663.98/x
  3. Step 3: Cross multiply
    8,608.78x = 12,915.21 × 4,663.98
  4. Step 4: Simplify right side
    8,608.78x = 60,236,298.63
  5. Step 5: Solve for x
    x = 60,236,298.63/8,608.78
  6. Step 6: Final answer
    x = 6,997.08

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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.