Home / 7,938.40-11,909.21-2,391.52

Finding the Fourth Proportional to 7,938.40, 11,909.21 and 2,391.52

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Solution

The fourth proportional to 7,938.40, 11,909.21 and 2,391.52 is: 3,587.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,938.40 : 11,909.21 = 2,391.52 : x
  2. Step 2: Convert to fraction form
    7,938.40/11,909.21 = 2,391.52/x
  3. Step 3: Cross multiply
    7,938.40x = 11,909.21 × 2,391.52
  4. Step 4: Simplify right side
    7,938.40x = 28,481,113.90
  5. Step 5: Solve for x
    x = 28,481,113.90/7,938.40
  6. Step 6: Final answer
    x = 3,587.77

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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.