Home / 11,129.40-16,657.65-8,650.80

Finding the Fourth Proportional to 11,129.40, 16,657.65 and 8,650.80

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Solution

The fourth proportional to 11,129.40, 16,657.65 and 8,650.80 is: 12,947.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,129.40 : 16,657.65 = 8,650.80 : x
  2. Step 2: Convert to fraction form
    11,129.40/16,657.65 = 8,650.80/x
  3. Step 3: Cross multiply
    11,129.40x = 16,657.65 × 8,650.80
  4. Step 4: Simplify right side
    11,129.40x = 144,101,998.62
  5. Step 5: Solve for x
    x = 144,101,998.62/11,129.40
  6. Step 6: Final answer
    x = 12,947.87

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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.