Home / 20,711.86-31,038.83-11,203.65

Finding the Fourth Proportional to 20,711.86, 31,038.83 and 11,203.65

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Solution

The fourth proportional to 20,711.86, 31,038.83 and 11,203.65 is: 16,789.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,711.86 : 31,038.83 = 11,203.65 : x
  2. Step 2: Convert to fraction form
    20,711.86/31,038.83 = 11,203.65/x
  3. Step 3: Cross multiply
    20,711.86x = 31,038.83 × 11,203.65
  4. Step 4: Simplify right side
    20,711.86x = 347,748,187.73
  5. Step 5: Solve for x
    x = 347,748,187.73/20,711.86
  6. Step 6: Final answer
    x = 16,789.81

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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.