Home / 20,838.05-28,757.20-11,406.61

Finding the Fourth Proportional to 20,838.05, 28,757.20 and 11,406.61

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Solution

The fourth proportional to 20,838.05, 28,757.20 and 11,406.61 is: 15,741.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.05 : 28,757.20 = 11,406.61 : x
  2. Step 2: Convert to fraction form
    20,838.05/28,757.20 = 11,406.61/x
  3. Step 3: Cross multiply
    20,838.05x = 28,757.20 × 11,406.61
  4. Step 4: Simplify right side
    20,838.05x = 328,022,108.06
  5. Step 5: Solve for x
    x = 328,022,108.06/20,838.05
  6. Step 6: Final answer
    x = 15,741.50

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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.