Home / 28,658.28-42,991.73-8,938.38

Finding the Fourth Proportional to 28,658.28, 42,991.73 and 8,938.38

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Solution

The fourth proportional to 28,658.28, 42,991.73 and 8,938.38 is: 13,408.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,658.28 : 42,991.73 = 8,938.38 : x
  2. Step 2: Convert to fraction form
    28,658.28/42,991.73 = 8,938.38/x
  3. Step 3: Cross multiply
    28,658.28x = 42,991.73 × 8,938.38
  4. Step 4: Simplify right side
    28,658.28x = 384,276,419.60
  5. Step 5: Solve for x
    x = 384,276,419.60/28,658.28
  6. Step 6: Final answer
    x = 13,408.91

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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.