Home / 13,375.40-20,106.30-12,338.60

Finding the Fourth Proportional to 13,375.40, 20,106.30 and 12,338.60

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Solution

The fourth proportional to 13,375.40, 20,106.30 and 12,338.60 is: 18,547.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,375.40 : 20,106.30 = 12,338.60 : x
  2. Step 2: Convert to fraction form
    13,375.40/20,106.30 = 12,338.60/x
  3. Step 3: Cross multiply
    13,375.40x = 20,106.30 × 12,338.60
  4. Step 4: Simplify right side
    13,375.40x = 248,083,593.18
  5. Step 5: Solve for x
    x = 248,083,593.18/13,375.40
  6. Step 6: Final answer
    x = 18,547.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.