Home / 20,921.46-28,866.47-11,847.03

Finding the Fourth Proportional to 20,921.46, 28,866.47 and 11,847.03

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Solution

The fourth proportional to 20,921.46, 28,866.47 and 11,847.03 is: 16,345.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.46 : 28,866.47 = 11,847.03 : x
  2. Step 2: Convert to fraction form
    20,921.46/28,866.47 = 11,847.03/x
  3. Step 3: Cross multiply
    20,921.46x = 28,866.47 × 11,847.03
  4. Step 4: Simplify right side
    20,921.46x = 341,981,876.85
  5. Step 5: Solve for x
    x = 341,981,876.85/20,921.46
  6. Step 6: Final answer
    x = 16,345.99

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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.