Home / 21,194.85-31,795.20-7,158.90

Finding the Fourth Proportional to 21,194.85, 31,795.20 and 7,158.90

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Solution

The fourth proportional to 21,194.85, 31,795.20 and 7,158.90 is: 10,739.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,194.85 : 31,795.20 = 7,158.90 : x
  2. Step 2: Convert to fraction form
    21,194.85/31,795.20 = 7,158.90/x
  3. Step 3: Cross multiply
    21,194.85x = 31,795.20 × 7,158.90
  4. Step 4: Simplify right side
    21,194.85x = 227,618,657.28
  5. Step 5: Solve for x
    x = 227,618,657.28/21,194.85
  6. Step 6: Final answer
    x = 10,739.34

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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.