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Finding the Fourth Proportional to 8,971.62, 12,377.64 and 5,618.62

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Solution

The fourth proportional to 8,971.62, 12,377.64 and 5,618.62 is: 7,751.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,971.62 : 12,377.64 = 5,618.62 : x
  2. Step 2: Convert to fraction form
    8,971.62/12,377.64 = 5,618.62/x
  3. Step 3: Cross multiply
    8,971.62x = 12,377.64 × 5,618.62
  4. Step 4: Simplify right side
    8,971.62x = 69,545,255.66
  5. Step 5: Solve for x
    x = 69,545,255.66/8,971.62
  6. Step 6: Final answer
    x = 7,751.69

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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.