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Finding the Fourth Proportional to 20,491.30, 30,740.55 and 7,351.30

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Solution

The fourth proportional to 20,491.30, 30,740.55 and 7,351.30 is: 11,028.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.30 : 30,740.55 = 7,351.30 : x
  2. Step 2: Convert to fraction form
    20,491.30/30,740.55 = 7,351.30/x
  3. Step 3: Cross multiply
    20,491.30x = 30,740.55 × 7,351.30
  4. Step 4: Simplify right side
    20,491.30x = 225,983,005.22
  5. Step 5: Solve for x
    x = 225,983,005.22/20,491.30
  6. Step 6: Final answer
    x = 11,028.24

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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.