Home / 20,717.15-28,591.73-12,650.36

Finding the Fourth Proportional to 20,717.15, 28,591.73 and 12,650.36

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Solution

The fourth proportional to 20,717.15, 28,591.73 and 12,650.36 is: 17,458.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.15 : 28,591.73 = 12,650.36 : x
  2. Step 2: Convert to fraction form
    20,717.15/28,591.73 = 12,650.36/x
  3. Step 3: Cross multiply
    20,717.15x = 28,591.73 × 12,650.36
  4. Step 4: Simplify right side
    20,717.15x = 361,695,471.31
  5. Step 5: Solve for x
    x = 361,695,471.31/20,717.15
  6. Step 6: Final answer
    x = 17,458.75

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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.