Home / 12,015.80-18,029.10-5,438.60

Finding the Fourth Proportional to 12,015.80, 18,029.10 and 5,438.60

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Solution

The fourth proportional to 12,015.80, 18,029.10 and 5,438.60 is: 8,160.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,015.80 : 18,029.10 = 5,438.60 : x
  2. Step 2: Convert to fraction form
    12,015.80/18,029.10 = 5,438.60/x
  3. Step 3: Cross multiply
    12,015.80x = 18,029.10 × 5,438.60
  4. Step 4: Simplify right side
    12,015.80x = 98,053,063.26
  5. Step 5: Solve for x
    x = 98,053,063.26/12,015.80
  6. Step 6: Final answer
    x = 8,160.34

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1.5x scale

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.