Home / 20,009.90-30,015.39-5,218.49

Finding the Fourth Proportional to 20,009.90, 30,015.39 and 5,218.49

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Solution

The fourth proportional to 20,009.90, 30,015.39 and 5,218.49 is: 7,827.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,009.90 : 30,015.39 = 5,218.49 : x
  2. Step 2: Convert to fraction form
    20,009.90/30,015.39 = 5,218.49/x
  3. Step 3: Cross multiply
    20,009.90x = 30,015.39 × 5,218.49
  4. Step 4: Simplify right side
    20,009.90x = 156,635,107.17
  5. Step 5: Solve for x
    x = 156,635,107.17/20,009.90
  6. Step 6: Final answer
    x = 7,827.88

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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.