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Finding the Fourth Proportional to 8,915.27, 12,319.34 and 8,482.93

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Solution

The fourth proportional to 8,915.27, 12,319.34 and 8,482.93 is: 11,721.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,915.27 : 12,319.34 = 8,482.93 : x
  2. Step 2: Convert to fraction form
    8,915.27/12,319.34 = 8,482.93/x
  3. Step 3: Cross multiply
    8,915.27x = 12,319.34 × 8,482.93
  4. Step 4: Simplify right side
    8,915.27x = 104,504,025.65
  5. Step 5: Solve for x
    x = 104,504,025.65/8,915.27
  6. Step 6: Final answer
    x = 11,721.92

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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.