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Finding the Fourth Proportional to 8,782.82, 12,108.85 and 6,393.18

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Solution

The fourth proportional to 8,782.82, 12,108.85 and 6,393.18 is: 8,814.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,782.82 : 12,108.85 = 6,393.18 : x
  2. Step 2: Convert to fraction form
    8,782.82/12,108.85 = 6,393.18/x
  3. Step 3: Cross multiply
    8,782.82x = 12,108.85 × 6,393.18
  4. Step 4: Simplify right side
    8,782.82x = 77,414,041.66
  5. Step 5: Solve for x
    x = 77,414,041.66/8,782.82
  6. Step 6: Final answer
    x = 8,814.26

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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.