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Finding the Fourth Proportional to 8,658.91, 12,915.43 and 7,255.99

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Solution

The fourth proportional to 8,658.91, 12,915.43 and 7,255.99 is: 10,822.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.91 : 12,915.43 = 7,255.99 : x
  2. Step 2: Convert to fraction form
    8,658.91/12,915.43 = 7,255.99/x
  3. Step 3: Cross multiply
    8,658.91x = 12,915.43 × 7,255.99
  4. Step 4: Simplify right side
    8,658.91x = 93,714,230.93
  5. Step 5: Solve for x
    x = 93,714,230.93/8,658.91
  6. Step 6: Final answer
    x = 10,822.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.