Home / 20,919.08-28,868.33-11,358.92

Finding the Fourth Proportional to 20,919.08, 28,868.33 and 11,358.92

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Solution

The fourth proportional to 20,919.08, 28,868.33 and 11,358.92 is: 15,675.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.08 : 28,868.33 = 11,358.92 : x
  2. Step 2: Convert to fraction form
    20,919.08/28,868.33 = 11,358.92/x
  3. Step 3: Cross multiply
    20,919.08x = 28,868.33 × 11,358.92
  4. Step 4: Simplify right side
    20,919.08x = 327,913,151.57
  5. Step 5: Solve for x
    x = 327,913,151.57/20,919.08
  6. Step 6: Final answer
    x = 15,675.31

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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.