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Finding the Fourth Proportional to 8,791.92, 12,116.48 and 7,210.80

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Solution

The fourth proportional to 8,791.92, 12,116.48 and 7,210.80 is: 9,937.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,791.92 : 12,116.48 = 7,210.80 : x
  2. Step 2: Convert to fraction form
    8,791.92/12,116.48 = 7,210.80/x
  3. Step 3: Cross multiply
    8,791.92x = 12,116.48 × 7,210.80
  4. Step 4: Simplify right side
    8,791.92x = 87,369,513.98
  5. Step 5: Solve for x
    x = 87,369,513.98/8,791.92
  6. Step 6: Final answer
    x = 9,937.48

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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.