Home / 12,009.40-18,016.84-4,218.22

Finding the Fourth Proportional to 12,009.40, 18,016.84 and 4,218.22

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Solution

The fourth proportional to 12,009.40, 18,016.84 and 4,218.22 is: 6,328.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,009.40 : 18,016.84 = 4,218.22 : x
  2. Step 2: Convert to fraction form
    12,009.40/18,016.84 = 4,218.22/x
  3. Step 3: Cross multiply
    12,009.40x = 18,016.84 × 4,218.22
  4. Step 4: Simplify right side
    12,009.40x = 75,998,994.82
  5. Step 5: Solve for x
    x = 75,998,994.82/12,009.40
  6. Step 6: Final answer
    x = 6,328.29

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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.