Home / 12,981.06-17,912.88-7,315.92

Finding the Fourth Proportional to 12,981.06, 17,912.88 and 7,315.92

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Solution

The fourth proportional to 12,981.06, 17,912.88 and 7,315.92 is: 10,095.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,981.06 : 17,912.88 = 7,315.92 : x
  2. Step 2: Convert to fraction form
    12,981.06/17,912.88 = 7,315.92/x
  3. Step 3: Cross multiply
    12,981.06x = 17,912.88 × 7,315.92
  4. Step 4: Simplify right side
    12,981.06x = 131,049,197.05
  5. Step 5: Solve for x
    x = 131,049,197.05/12,981.06
  6. Step 6: Final answer
    x = 10,095.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.