Home / 20,950.25-28,911.34-11,518.81

Finding the Fourth Proportional to 20,950.25, 28,911.34 and 11,518.81

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Solution

The fourth proportional to 20,950.25, 28,911.34 and 11,518.81 is: 15,895.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,950.25 : 28,911.34 = 11,518.81 : x
  2. Step 2: Convert to fraction form
    20,950.25/28,911.34 = 11,518.81/x
  3. Step 3: Cross multiply
    20,950.25x = 28,911.34 × 11,518.81
  4. Step 4: Simplify right side
    20,950.25x = 333,024,131.23
  5. Step 5: Solve for x
    x = 333,024,131.23/20,950.25
  6. Step 6: Final answer
    x = 15,895.95

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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.