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Finding the Fourth Proportional to 8,879.88, 12,263.28 and 6,231.72

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Solution

The fourth proportional to 8,879.88, 12,263.28 and 6,231.72 is: 8,606.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,879.88 : 12,263.28 = 6,231.72 : x
  2. Step 2: Convert to fraction form
    8,879.88/12,263.28 = 6,231.72/x
  3. Step 3: Cross multiply
    8,879.88x = 12,263.28 × 6,231.72
  4. Step 4: Simplify right side
    8,879.88x = 76,421,327.24
  5. Step 5: Solve for x
    x = 76,421,327.24/8,879.88
  6. Step 6: Final answer
    x = 8,606.12

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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.