Home / 20,491.31-28,277.97-11,538.87

Finding the Fourth Proportional to 20,491.31, 28,277.97 and 11,538.87

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Solution

The fourth proportional to 20,491.31, 28,277.97 and 11,538.87 is: 15,923.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.31 : 28,277.97 = 11,538.87 : x
  2. Step 2: Convert to fraction form
    20,491.31/28,277.97 = 11,538.87/x
  3. Step 3: Cross multiply
    20,491.31x = 28,277.97 × 11,538.87
  4. Step 4: Simplify right side
    20,491.31x = 326,295,762.00
  5. Step 5: Solve for x
    x = 326,295,762.00/20,491.31
  6. Step 6: Final answer
    x = 15,923.62

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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.