Home / 20,905.27-28,847.77-11,953.15

Finding the Fourth Proportional to 20,905.27, 28,847.77 and 11,953.15

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Solution

The fourth proportional to 20,905.27, 28,847.77 and 11,953.15 is: 16,494.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,905.27 : 28,847.77 = 11,953.15 : x
  2. Step 2: Convert to fraction form
    20,905.27/28,847.77 = 11,953.15/x
  3. Step 3: Cross multiply
    20,905.27x = 28,847.77 × 11,953.15
  4. Step 4: Simplify right side
    20,905.27x = 344,821,721.98
  5. Step 5: Solve for x
    x = 344,821,721.98/20,905.27
  6. Step 6: Final answer
    x = 16,494.49

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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.