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Finding the Fourth Proportional to 20,009.13, 30,012.90 and 5,016.21

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Solution

The fourth proportional to 20,009.13, 30,012.90 and 5,016.21 is: 7,524.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,009.13 : 30,012.90 = 5,016.21 : x
  2. Step 2: Convert to fraction form
    20,009.13/30,012.90 = 5,016.21/x
  3. Step 3: Cross multiply
    20,009.13x = 30,012.90 × 5,016.21
  4. Step 4: Simplify right side
    20,009.13x = 150,551,009.11
  5. Step 5: Solve for x
    x = 150,551,009.11/20,009.13
  6. Step 6: Final answer
    x = 7,524.12

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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.