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Finding the Fourth Proportional to 8,778.16, 12,101.04 and 6,678.64

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Solution

The fourth proportional to 8,778.16, 12,101.04 and 6,678.64 is: 9,206.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,778.16 : 12,101.04 = 6,678.64 : x
  2. Step 2: Convert to fraction form
    8,778.16/12,101.04 = 6,678.64/x
  3. Step 3: Cross multiply
    8,778.16x = 12,101.04 × 6,678.64
  4. Step 4: Simplify right side
    8,778.16x = 80,818,489.79
  5. Step 5: Solve for x
    x = 80,818,489.79/8,778.16
  6. Step 6: Final answer
    x = 9,206.77

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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.