Home / 38,679.12-57,942.72-21,989.16

Finding the Fourth Proportional to 38,679.12, 57,942.72 and 21,989.16

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Solution

The fourth proportional to 38,679.12, 57,942.72 and 21,989.16 is: 32,940.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,679.12 : 57,942.72 = 21,989.16 : x
  2. Step 2: Convert to fraction form
    38,679.12/57,942.72 = 21,989.16/x
  3. Step 3: Cross multiply
    38,679.12x = 57,942.72 × 21,989.16
  4. Step 4: Simplify right side
    38,679.12x = 1,274,111,740.92
  5. Step 5: Solve for x
    x = 1,274,111,740.92/38,679.12
  6. Step 6: Final answer
    x = 32,940.56

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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.