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Finding the Fourth Proportional to 8,991.32, 13,466.12 and 8,679.92

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Solution

The fourth proportional to 8,991.32, 13,466.12 and 8,679.92 is: 12,999.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.32 : 13,466.12 = 8,679.92 : x
  2. Step 2: Convert to fraction form
    8,991.32/13,466.12 = 8,679.92/x
  3. Step 3: Cross multiply
    8,991.32x = 13,466.12 × 8,679.92
  4. Step 4: Simplify right side
    8,991.32x = 116,884,844.31
  5. Step 5: Solve for x
    x = 116,884,844.31/8,991.32
  6. Step 6: Final answer
    x = 12,999.74

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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.