Home / 20,635.35-28,476.39-12,138.39

Finding the Fourth Proportional to 20,635.35, 28,476.39 and 12,138.39

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Solution

The fourth proportional to 20,635.35, 28,476.39 and 12,138.39 is: 16,750.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,635.35 : 28,476.39 = 12,138.39 : x
  2. Step 2: Convert to fraction form
    20,635.35/28,476.39 = 12,138.39/x
  3. Step 3: Cross multiply
    20,635.35x = 28,476.39 × 12,138.39
  4. Step 4: Simplify right side
    20,635.35x = 345,657,527.61
  5. Step 5: Solve for x
    x = 345,657,527.61/20,635.35
  6. Step 6: Final answer
    x = 16,750.75

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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.