Home / 20,217.80-30,302.94-9,111.56

Finding the Fourth Proportional to 20,217.80, 30,302.94 and 9,111.56

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Solution

The fourth proportional to 20,217.80, 30,302.94 and 9,111.56 is: 13,656.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,217.80 : 30,302.94 = 9,111.56 : x
  2. Step 2: Convert to fraction form
    20,217.80/30,302.94 = 9,111.56/x
  3. Step 3: Cross multiply
    20,217.80x = 30,302.94 × 9,111.56
  4. Step 4: Simplify right side
    20,217.80x = 276,107,055.99
  5. Step 5: Solve for x
    x = 276,107,055.99/20,217.80
  6. Step 6: Final answer
    x = 13,656.63

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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.