Home / 38,679.62-53,376.08-21,912.74

Finding the Fourth Proportional to 38,679.62, 53,376.08 and 21,912.74

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Solution

The fourth proportional to 38,679.62, 53,376.08 and 21,912.74 is: 30,238.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,679.62 : 53,376.08 = 21,912.74 : x
  2. Step 2: Convert to fraction form
    38,679.62/53,376.08 = 21,912.74/x
  3. Step 3: Cross multiply
    38,679.62x = 53,376.08 × 21,912.74
  4. Step 4: Simplify right side
    38,679.62x = 1,169,616,163.26
  5. Step 5: Solve for x
    x = 1,169,616,163.26/38,679.62
  6. Step 6: Final answer
    x = 30,238.56

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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.