Home / 20,393.14-28,140.34-11,778.80

Finding the Fourth Proportional to 20,393.14, 28,140.34 and 11,778.80

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Solution

The fourth proportional to 20,393.14, 28,140.34 and 11,778.80 is: 16,253.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.14 : 28,140.34 = 11,778.80 : x
  2. Step 2: Convert to fraction form
    20,393.14/28,140.34 = 11,778.80/x
  3. Step 3: Cross multiply
    20,393.14x = 28,140.34 × 11,778.80
  4. Step 4: Simplify right side
    20,393.14x = 331,459,436.79
  5. Step 5: Solve for x
    x = 331,459,436.79/20,393.14
  6. Step 6: Final answer
    x = 16,253.48

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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.