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Finding the Fourth Proportional to 8,791.60, 12,127.26 and 5,205.32

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Solution

The fourth proportional to 8,791.60, 12,127.26 and 5,205.32 is: 7,180.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,791.60 : 12,127.26 = 5,205.32 : x
  2. Step 2: Convert to fraction form
    8,791.60/12,127.26 = 5,205.32/x
  3. Step 3: Cross multiply
    8,791.60x = 12,127.26 × 5,205.32
  4. Step 4: Simplify right side
    8,791.60x = 63,126,269.02
  5. Step 5: Solve for x
    x = 63,126,269.02/8,791.60
  6. Step 6: Final answer
    x = 7,180.29

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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.