Home / 12,018.90-18,028.47-4,227.66

Finding the Fourth Proportional to 12,018.90, 18,028.47 and 4,227.66

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Solution

The fourth proportional to 12,018.90, 18,028.47 and 4,227.66 is: 6,341.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,018.90 : 18,028.47 = 4,227.66 : x
  2. Step 2: Convert to fraction form
    12,018.90/18,028.47 = 4,227.66/x
  3. Step 3: Cross multiply
    12,018.90x = 18,028.47 × 4,227.66
  4. Step 4: Simplify right side
    12,018.90x = 76,218,241.48
  5. Step 5: Solve for x
    x = 76,218,241.48/12,018.90
  6. Step 6: Final answer
    x = 6,341.53

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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.