Home / 20,862.27-28,790.64-11,911.10

Finding the Fourth Proportional to 20,862.27, 28,790.64 and 11,911.10

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Solution

The fourth proportional to 20,862.27, 28,790.64 and 11,911.10 is: 16,437.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,862.27 : 28,790.64 = 11,911.10 : x
  2. Step 2: Convert to fraction form
    20,862.27/28,790.64 = 11,911.10/x
  3. Step 3: Cross multiply
    20,862.27x = 28,790.64 × 11,911.10
  4. Step 4: Simplify right side
    20,862.27x = 342,928,048.15
  5. Step 5: Solve for x
    x = 342,928,048.15/20,862.27
  6. Step 6: Final answer
    x = 16,437.71

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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.