Home / 12,938.87-19,408.29-5,538.53

Finding the Fourth Proportional to 12,938.87, 19,408.29 and 5,538.53

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Solution

The fourth proportional to 12,938.87, 19,408.29 and 5,538.53 is: 8,307.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938.87 : 19,408.29 = 5,538.53 : x
  2. Step 2: Convert to fraction form
    12,938.87/19,408.29 = 5,538.53/x
  3. Step 3: Cross multiply
    12,938.87x = 19,408.29 × 5,538.53
  4. Step 4: Simplify right side
    12,938.87x = 107,493,396.41
  5. Step 5: Solve for x
    x = 107,493,396.41/12,938.87
  6. Step 6: Final answer
    x = 8,307.79

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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.