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Finding the Fourth Proportional to 8,915.86, 12,304.74 and 5,379.04

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Solution

The fourth proportional to 8,915.86, 12,304.74 and 5,379.04 is: 7,423.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,915.86 : 12,304.74 = 5,379.04 : x
  2. Step 2: Convert to fraction form
    8,915.86/12,304.74 = 5,379.04/x
  3. Step 3: Cross multiply
    8,915.86x = 12,304.74 × 5,379.04
  4. Step 4: Simplify right side
    8,915.86x = 66,187,688.65
  5. Step 5: Solve for x
    x = 66,187,688.65/8,915.86
  6. Step 6: Final answer
    x = 7,423.59

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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.