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Finding the Fourth Proportional to 8,625.96, 12,921.66 and 5,161.32

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Solution

The fourth proportional to 8,625.96, 12,921.66 and 5,161.32 is: 7,731.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,625.96 : 12,921.66 = 5,161.32 : x
  2. Step 2: Convert to fraction form
    8,625.96/12,921.66 = 5,161.32/x
  3. Step 3: Cross multiply
    8,625.96x = 12,921.66 × 5,161.32
  4. Step 4: Simplify right side
    8,625.96x = 66,692,822.19
  5. Step 5: Solve for x
    x = 66,692,822.19/8,625.96
  6. Step 6: Final answer
    x = 7,731.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.