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Finding the Fourth Proportional to 20,406.99, 30,610.48 and 7,259.47

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Solution

The fourth proportional to 20,406.99, 30,610.48 and 7,259.47 is: 10,889.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,406.99 : 30,610.48 = 7,259.47 : x
  2. Step 2: Convert to fraction form
    20,406.99/30,610.48 = 7,259.47/x
  3. Step 3: Cross multiply
    20,406.99x = 30,610.48 × 7,259.47
  4. Step 4: Simplify right side
    20,406.99x = 222,215,972.78
  5. Step 5: Solve for x
    x = 222,215,972.78/20,406.99
  6. Step 6: Final answer
    x = 10,889.21

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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.