Home / 38,102.31-57,157.23-13,139.07

Finding the Fourth Proportional to 38,102.31, 57,157.23 and 13,139.07

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Solution

The fourth proportional to 38,102.31, 57,157.23 and 13,139.07 is: 19,709.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,102.31 : 57,157.23 = 13,139.07 : x
  2. Step 2: Convert to fraction form
    38,102.31/57,157.23 = 13,139.07/x
  3. Step 3: Cross multiply
    38,102.31x = 57,157.23 × 13,139.07
  4. Step 4: Simplify right side
    38,102.31x = 750,992,845.98
  5. Step 5: Solve for x
    x = 750,992,845.98/38,102.31
  6. Step 6: Final answer
    x = 19,709.90

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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.