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Finding the Fourth Proportional to 11,264.40, 16,885.80 and 8,764.20

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Solution

The fourth proportional to 11,264.40, 16,885.80 and 8,764.20 is: 13,137.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,264.40 : 16,885.80 = 8,764.20 : x
  2. Step 2: Convert to fraction form
    11,264.40/16,885.80 = 8,764.20/x
  3. Step 3: Cross multiply
    11,264.40x = 16,885.80 × 8,764.20
  4. Step 4: Simplify right side
    11,264.40x = 147,990,528.36
  5. Step 5: Solve for x
    x = 147,990,528.36/11,264.40
  6. Step 6: Final answer
    x = 13,137.90

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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.