Home / 25,419.10-38,135.85-7,890.70

Finding the Fourth Proportional to 25,419.10, 38,135.85 and 7,890.70

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Solution

The fourth proportional to 25,419.10, 38,135.85 and 7,890.70 is: 11,838.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,419.10 : 38,135.85 = 7,890.70 : x
  2. Step 2: Convert to fraction form
    25,419.10/38,135.85 = 7,890.70/x
  3. Step 3: Cross multiply
    25,419.10x = 38,135.85 × 7,890.70
  4. Step 4: Simplify right side
    25,419.10x = 300,918,551.60
  5. Step 5: Solve for x
    x = 300,918,551.60/25,419.10
  6. Step 6: Final answer
    x = 11,838.29

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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.