Home / 11,139.80-16,709.70-8,223.80

Finding the Fourth Proportional to 11,139.80, 16,709.70 and 8,223.80

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Solution

The fourth proportional to 11,139.80, 16,709.70 and 8,223.80 is: 12,335.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139.80 : 16,709.70 = 8,223.80 : x
  2. Step 2: Convert to fraction form
    11,139.80/16,709.70 = 8,223.80/x
  3. Step 3: Cross multiply
    11,139.80x = 16,709.70 × 8,223.80
  4. Step 4: Simplify right side
    11,139.80x = 137,417,230.86
  5. Step 5: Solve for x
    x = 137,417,230.86/11,139.80
  6. Step 6: Final answer
    x = 12,335.70

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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.