Home / 20,950.06-28,910.76-11,390.05

Finding the Fourth Proportional to 20,950.06, 28,910.76 and 11,390.05

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Solution

The fourth proportional to 20,950.06, 28,910.76 and 11,390.05 is: 15,718.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,950.06 : 28,910.76 = 11,390.05 : x
  2. Step 2: Convert to fraction form
    20,950.06/28,910.76 = 11,390.05/x
  3. Step 3: Cross multiply
    20,950.06x = 28,910.76 × 11,390.05
  4. Step 4: Simplify right side
    20,950.06x = 329,295,001.94
  5. Step 5: Solve for x
    x = 329,295,001.94/20,950.06
  6. Step 6: Final answer
    x = 15,718.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.