Home / 20,854.05-28,775.92-11,899.19

Finding the Fourth Proportional to 20,854.05, 28,775.92 and 11,899.19

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Solution

The fourth proportional to 20,854.05, 28,775.92 and 11,899.19 is: 16,419.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.05 : 28,775.92 = 11,899.19 : x
  2. Step 2: Convert to fraction form
    20,854.05/28,775.92 = 11,899.19/x
  3. Step 3: Cross multiply
    20,854.05x = 28,775.92 × 11,899.19
  4. Step 4: Simplify right side
    20,854.05x = 342,410,139.50
  5. Step 5: Solve for x
    x = 342,410,139.50/20,854.05
  6. Step 6: Final answer
    x = 16,419.36

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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.