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Finding the Fourth Proportional to 20,409.02, 30,615.22 and 5,619.14

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Solution

The fourth proportional to 20,409.02, 30,615.22 and 5,619.14 is: 8,429.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,409.02 : 30,615.22 = 5,619.14 : x
  2. Step 2: Convert to fraction form
    20,409.02/30,615.22 = 5,619.14/x
  3. Step 3: Cross multiply
    20,409.02x = 30,615.22 × 5,619.14
  4. Step 4: Simplify right side
    20,409.02x = 172,031,207.31
  5. Step 5: Solve for x
    x = 172,031,207.31/20,409.02
  6. Step 6: Final answer
    x = 8,429.18

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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.