Home / 18,278.80-27,420.05-5,131.22

Finding the Fourth Proportional to 18,278.80, 27,420.05 and 5,131.22

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Solution

The fourth proportional to 18,278.80, 27,420.05 and 5,131.22 is: 7,697.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,278.80 : 27,420.05 = 5,131.22 : x
  2. Step 2: Convert to fraction form
    18,278.80/27,420.05 = 5,131.22/x
  3. Step 3: Cross multiply
    18,278.80x = 27,420.05 × 5,131.22
  4. Step 4: Simplify right side
    18,278.80x = 140,698,184.69
  5. Step 5: Solve for x
    x = 140,698,184.69/18,278.80
  6. Step 6: Final answer
    x = 7,697.34

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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.