Home / 20,198.50-27,886.98-13,135.30

Finding the Fourth Proportional to 20,198.50, 27,886.98 and 13,135.30

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Solution

The fourth proportional to 20,198.50, 27,886.98 and 13,135.30 is: 18,135.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,198.50 : 27,886.98 = 13,135.30 : x
  2. Step 2: Convert to fraction form
    20,198.50/27,886.98 = 13,135.30/x
  3. Step 3: Cross multiply
    20,198.50x = 27,886.98 × 13,135.30
  4. Step 4: Simplify right side
    20,198.50x = 366,303,848.39
  5. Step 5: Solve for x
    x = 366,303,848.39/20,198.50
  6. Step 6: Final answer
    x = 18,135.20

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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.