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Finding the Fourth Proportional to 38,672.80, 57,922.80 and 31,760.80

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Solution

The fourth proportional to 38,672.80, 57,922.80 and 31,760.80 is: 47,570.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,672.80 : 57,922.80 = 31,760.80 : x
  2. Step 2: Convert to fraction form
    38,672.80/57,922.80 = 31,760.80/x
  3. Step 3: Cross multiply
    38,672.80x = 57,922.80 × 31,760.80
  4. Step 4: Simplify right side
    38,672.80x = 1,839,674,466.24
  5. Step 5: Solve for x
    x = 1,839,674,466.24/38,672.80
  6. Step 6: Final answer
    x = 47,570.24

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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.