Home / 7,905.52-11,859.50-2,638.90

Finding the Fourth Proportional to 7,905.52, 11,859.50 and 2,638.90

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Solution

The fourth proportional to 7,905.52, 11,859.50 and 2,638.90 is: 3,958.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,905.52 : 11,859.50 = 2,638.90 : x
  2. Step 2: Convert to fraction form
    7,905.52/11,859.50 = 2,638.90/x
  3. Step 3: Cross multiply
    7,905.52x = 11,859.50 × 2,638.90
  4. Step 4: Simplify right side
    7,905.52x = 31,296,034.55
  5. Step 5: Solve for x
    x = 31,296,034.55/7,905.52
  6. Step 6: Final answer
    x = 3,958.76

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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.