Home / 20,838.37-28,760.29-11,888.78

Finding the Fourth Proportional to 20,838.37, 28,760.29 and 11,888.78

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Solution

The fourth proportional to 20,838.37, 28,760.29 and 11,888.78 is: 16,408.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,838.37 : 28,760.29 = 11,888.78 : x
  2. Step 2: Convert to fraction form
    20,838.37/28,760.29 = 11,888.78/x
  3. Step 3: Cross multiply
    20,838.37x = 28,760.29 × 11,888.78
  4. Step 4: Simplify right side
    20,838.37x = 341,924,760.55
  5. Step 5: Solve for x
    x = 341,924,760.55/20,838.37
  6. Step 6: Final answer
    x = 16,408.42

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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.