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Finding the Fourth Proportional to 8,663.12, 12,991.84 and 2,818.32

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Solution

The fourth proportional to 8,663.12, 12,991.84 and 2,818.32 is: 4,226.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,663.12 : 12,991.84 = 2,818.32 : x
  2. Step 2: Convert to fraction form
    8,663.12/12,991.84 = 2,818.32/x
  3. Step 3: Cross multiply
    8,663.12x = 12,991.84 × 2,818.32
  4. Step 4: Simplify right side
    8,663.12x = 36,615,162.51
  5. Step 5: Solve for x
    x = 36,615,162.51/8,663.12
  6. Step 6: Final answer
    x = 4,226.56

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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.