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Finding the Fourth Proportional to 20,006.20, 30,009.30 and 8,918.20

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Solution

The fourth proportional to 20,006.20, 30,009.30 and 8,918.20 is: 13,377.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,006.20 : 30,009.30 = 8,918.20 : x
  2. Step 2: Convert to fraction form
    20,006.20/30,009.30 = 8,918.20/x
  3. Step 3: Cross multiply
    20,006.20x = 30,009.30 × 8,918.20
  4. Step 4: Simplify right side
    20,006.20x = 267,628,939.26
  5. Step 5: Solve for x
    x = 267,628,939.26/20,006.20
  6. Step 6: Final answer
    x = 13,377.30

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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.