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Finding the Fourth Proportional to 8,118.88, 12,159.16 and 6,351.51

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Solution

The fourth proportional to 8,118.88, 12,159.16 and 6,351.51 is: 9,512.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,118.88 : 12,159.16 = 6,351.51 : x
  2. Step 2: Convert to fraction form
    8,118.88/12,159.16 = 6,351.51/x
  3. Step 3: Cross multiply
    8,118.88x = 12,159.16 × 6,351.51
  4. Step 4: Simplify right side
    8,118.88x = 77,229,091.78
  5. Step 5: Solve for x
    x = 77,229,091.78/8,118.88
  6. Step 6: Final answer
    x = 9,512.28

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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.