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Finding the Fourth Proportional to 8,669.12, 12,989.04 and 6,832.16

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Solution

The fourth proportional to 8,669.12, 12,989.04 and 6,832.16 is: 10,236.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,669.12 : 12,989.04 = 6,832.16 : x
  2. Step 2: Convert to fraction form
    8,669.12/12,989.04 = 6,832.16/x
  3. Step 3: Cross multiply
    8,669.12x = 12,989.04 × 6,832.16
  4. Step 4: Simplify right side
    8,669.12x = 88,743,199.53
  5. Step 5: Solve for x
    x = 88,743,199.53/8,669.12
  6. Step 6: Final answer
    x = 10,236.70

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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.