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Finding the Fourth Proportional to 8,658.16, 12,914.32 and 7,255.24

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Solution

The fourth proportional to 8,658.16, 12,914.32 and 7,255.24 is: 10,821.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,658.16 : 12,914.32 = 7,255.24 : x
  2. Step 2: Convert to fraction form
    8,658.16/12,914.32 = 7,255.24/x
  3. Step 3: Cross multiply
    8,658.16x = 12,914.32 × 7,255.24
  4. Step 4: Simplify right side
    8,658.16x = 93,696,491.04
  5. Step 5: Solve for x
    x = 93,696,491.04/8,658.16
  6. Step 6: Final answer
    x = 10,821.76

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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.