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Finding the Fourth Proportional to 11,269.80, 16,920.90 and 8,807.40

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Solution

The fourth proportional to 11,269.80, 16,920.90 and 8,807.40 is: 13,223.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,269.80 : 16,920.90 = 8,807.40 : x
  2. Step 2: Convert to fraction form
    11,269.80/16,920.90 = 8,807.40/x
  3. Step 3: Cross multiply
    11,269.80x = 16,920.90 × 8,807.40
  4. Step 4: Simplify right side
    11,269.80x = 149,029,134.66
  5. Step 5: Solve for x
    x = 149,029,134.66/11,269.80
  6. Step 6: Final answer
    x = 13,223.76

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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.