Home / 20,667.78-28,535.22-15,879.24

Finding the Fourth Proportional to 20,667.78, 28,535.22 and 15,879.24

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Solution

The fourth proportional to 20,667.78, 28,535.22 and 15,879.24 is: 21,923.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.78 : 28,535.22 = 15,879.24 : x
  2. Step 2: Convert to fraction form
    20,667.78/28,535.22 = 15,879.24/x
  3. Step 3: Cross multiply
    20,667.78x = 28,535.22 × 15,879.24
  4. Step 4: Simplify right side
    20,667.78x = 453,117,606.83
  5. Step 5: Solve for x
    x = 453,117,606.83/20,667.78
  6. Step 6: Final answer
    x = 21,923.86

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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.