Home / 20,950.19-28,911.31-11,518.76

Finding the Fourth Proportional to 20,950.19, 28,911.31 and 11,518.76

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Solution

The fourth proportional to 20,950.19, 28,911.31 and 11,518.76 is: 15,895.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,950.19 : 28,911.31 = 11,518.76 : x
  2. Step 2: Convert to fraction form
    20,950.19/28,911.31 = 11,518.76/x
  3. Step 3: Cross multiply
    20,950.19x = 28,911.31 × 11,518.76
  4. Step 4: Simplify right side
    20,950.19x = 333,022,322.03
  5. Step 5: Solve for x
    x = 333,022,322.03/20,950.19
  6. Step 6: Final answer
    x = 15,895.91

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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.