Home / 20,838.25-28,756.92-11,885.66

Finding the Fourth Proportional to 20,838.25, 28,756.92 and 11,885.66

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Solution

The fourth proportional to 20,838.25, 28,756.92 and 11,885.66 is: 16,402.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.25 : 28,756.92 = 11,885.66 : x
  2. Step 2: Convert to fraction form
    20,838.25/28,756.92 = 11,885.66/x
  3. Step 3: Cross multiply
    20,838.25x = 28,756.92 × 11,885.66
  4. Step 4: Simplify right side
    20,838.25x = 341,794,973.77
  5. Step 5: Solve for x
    x = 341,794,973.77/20,838.25
  6. Step 6: Final answer
    x = 16,402.29

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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.