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Finding the Fourth Proportional to 7,405.70, 11,108.34 and 1,859.22

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Solution

The fourth proportional to 7,405.70, 11,108.34 and 1,859.22 is: 2,788.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,405.70 : 11,108.34 = 1,859.22 : x
  2. Step 2: Convert to fraction form
    7,405.70/11,108.34 = 1,859.22/x
  3. Step 3: Cross multiply
    7,405.70x = 11,108.34 × 1,859.22
  4. Step 4: Simplify right side
    7,405.70x = 20,652,847.89
  5. Step 5: Solve for x
    x = 20,652,847.89/7,405.70
  6. Step 6: Final answer
    x = 2,788.78

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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.