Home / 18,309.32-27,478.57-7,218.80

Finding the Fourth Proportional to 18,309.32, 27,478.57 and 7,218.80

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Solution

The fourth proportional to 18,309.32, 27,478.57 and 7,218.80 is: 10,833.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,309.32 : 27,478.57 = 7,218.80 : x
  2. Step 2: Convert to fraction form
    18,309.32/27,478.57 = 7,218.80/x
  3. Step 3: Cross multiply
    18,309.32x = 27,478.57 × 7,218.80
  4. Step 4: Simplify right side
    18,309.32x = 198,362,301.12
  5. Step 5: Solve for x
    x = 198,362,301.12/18,309.32
  6. Step 6: Final answer
    x = 10,833.95

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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.