Home / 15,112.40-20,855.00-8,398.22

Finding the Fourth Proportional to 15,112.40, 20,855.00 and 8,398.22

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Solution

The fourth proportional to 15,112.40, 20,855.00 and 8,398.22 is: 11,589.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,112.40 : 20,855.00 = 8,398.22 : x
  2. Step 2: Convert to fraction form
    15,112.40/20,855.00 = 8,398.22/x
  3. Step 3: Cross multiply
    15,112.40x = 20,855.00 × 8,398.22
  4. Step 4: Simplify right side
    15,112.40x = 175,144,794.82
  5. Step 5: Solve for x
    x = 175,144,794.82/15,112.40
  6. Step 6: Final answer
    x = 11,589.48

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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.