Home / 20,822.39-28,737.41-11,871.75

Finding the Fourth Proportional to 20,822.39, 28,737.41 and 11,871.75

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Solution

The fourth proportional to 20,822.39, 28,737.41 and 11,871.75 is: 16,384.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,822.39 : 28,737.41 = 11,871.75 : x
  2. Step 2: Convert to fraction form
    20,822.39/28,737.41 = 11,871.75/x
  3. Step 3: Cross multiply
    20,822.39x = 28,737.41 × 11,871.75
  4. Step 4: Simplify right side
    20,822.39x = 341,163,287.81
  5. Step 5: Solve for x
    x = 341,163,287.81/20,822.39
  6. Step 6: Final answer
    x = 16,384.45

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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.