Home / 13,144.12-18,137.82-7,478.44

Finding the Fourth Proportional to 13,144.12, 18,137.82 and 7,478.44

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Solution

The fourth proportional to 13,144.12, 18,137.82 and 7,478.44 is: 10,319.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,144.12 : 18,137.82 = 7,478.44 : x
  2. Step 2: Convert to fraction form
    13,144.12/18,137.82 = 7,478.44/x
  3. Step 3: Cross multiply
    13,144.12x = 18,137.82 × 7,478.44
  4. Step 4: Simplify right side
    13,144.12x = 135,642,598.60
  5. Step 5: Solve for x
    x = 135,642,598.60/13,144.12
  6. Step 6: Final answer
    x = 10,319.64

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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.