Home / 20,867.62-28,799.94-12,371.62

Finding the Fourth Proportional to 20,867.62, 28,799.94 and 12,371.62

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Solution

The fourth proportional to 20,867.62, 28,799.94 and 12,371.62 is: 17,074.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.62 : 28,799.94 = 12,371.62 : x
  2. Step 2: Convert to fraction form
    20,867.62/28,799.94 = 12,371.62/x
  3. Step 3: Cross multiply
    20,867.62x = 28,799.94 × 12,371.62
  4. Step 4: Simplify right side
    20,867.62x = 356,301,913.70
  5. Step 5: Solve for x
    x = 356,301,913.70/20,867.62
  6. Step 6: Final answer
    x = 17,074.39

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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.