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Finding the Fourth Proportional to 20,499.88, 30,741.66 and 7,348.20

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Solution

The fourth proportional to 20,499.88, 30,741.66 and 7,348.20 is: 11,019.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,499.88 : 30,741.66 = 7,348.20 : x
  2. Step 2: Convert to fraction form
    20,499.88/30,741.66 = 7,348.20/x
  3. Step 3: Cross multiply
    20,499.88x = 30,741.66 × 7,348.20
  4. Step 4: Simplify right side
    20,499.88x = 225,895,866.01
  5. Step 5: Solve for x
    x = 225,895,866.01/20,499.88
  6. Step 6: Final answer
    x = 11,019.38

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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.