Home / 7,905.20-11,859.90-2,641.15

Finding the Fourth Proportional to 7,905.20, 11,859.90 and 2,641.15

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Solution

The fourth proportional to 7,905.20, 11,859.90 and 2,641.15 is: 3,962.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,905.20 : 11,859.90 = 2,641.15 : x
  2. Step 2: Convert to fraction form
    7,905.20/11,859.90 = 2,641.15/x
  3. Step 3: Cross multiply
    7,905.20x = 11,859.90 × 2,641.15
  4. Step 4: Simplify right side
    7,905.20x = 31,323,702.38
  5. Step 5: Solve for x
    x = 31,323,702.38/7,905.20
  6. Step 6: Final answer
    x = 3,962.42

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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.