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Finding the Fourth Proportional to 38,900.67, 58,357.16 and 13,940.16

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Solution

The fourth proportional to 38,900.67, 58,357.16 and 13,940.16 is: 20,912.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,900.67 : 58,357.16 = 13,940.16 : x
  2. Step 2: Convert to fraction form
    38,900.67/58,357.16 = 13,940.16/x
  3. Step 3: Cross multiply
    38,900.67x = 58,357.16 × 13,940.16
  4. Step 4: Simplify right side
    38,900.67x = 813,508,147.55
  5. Step 5: Solve for x
    x = 813,508,147.55/38,900.67
  6. Step 6: Final answer
    x = 20,912.45

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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.