Home / 17,989.30-26,990.43-8,121.07

Finding the Fourth Proportional to 17,989.30, 26,990.43 and 8,121.07

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Solution

The fourth proportional to 17,989.30, 26,990.43 and 8,121.07 is: 12,184.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,989.30 : 26,990.43 = 8,121.07 : x
  2. Step 2: Convert to fraction form
    17,989.30/26,990.43 = 8,121.07/x
  3. Step 3: Cross multiply
    17,989.30x = 26,990.43 × 8,121.07
  4. Step 4: Simplify right side
    17,989.30x = 219,191,171.36
  5. Step 5: Solve for x
    x = 219,191,171.36/17,989.30
  6. Step 6: Final answer
    x = 12,184.53

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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.