Home / 12,938.86-19,408.30-5,538.53

Finding the Fourth Proportional to 12,938.86, 19,408.30 and 5,538.53

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Solution

The fourth proportional to 12,938.86, 19,408.30 and 5,538.53 is: 8,307.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938.86 : 19,408.30 = 5,538.53 : x
  2. Step 2: Convert to fraction form
    12,938.86/19,408.30 = 5,538.53/x
  3. Step 3: Cross multiply
    12,938.86x = 19,408.30 × 5,538.53
  4. Step 4: Simplify right side
    12,938.86x = 107,493,451.80
  5. Step 5: Solve for x
    x = 107,493,451.80/12,938.86
  6. Step 6: Final answer
    x = 8,307.80

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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.