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Finding the Fourth Proportional to 8,658.54, 12,914.88 and 7,255.62

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Solution

The fourth proportional to 8,658.54, 12,914.88 and 7,255.62 is: 10,822.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.54 : 12,914.88 = 7,255.62 : x
  2. Step 2: Convert to fraction form
    8,658.54/12,914.88 = 7,255.62/x
  3. Step 3: Cross multiply
    8,658.54x = 12,914.88 × 7,255.62
  4. Step 4: Simplify right side
    8,658.54x = 93,705,461.63
  5. Step 5: Solve for x
    x = 93,705,461.63/8,658.54
  6. Step 6: Final answer
    x = 10,822.32

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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.