Home / 18,129.28-27,195.20-6,439.36

Finding the Fourth Proportional to 18,129.28, 27,195.20 and 6,439.36

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Solution

The fourth proportional to 18,129.28, 27,195.20 and 6,439.36 is: 9,659.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,129.28 : 27,195.20 = 6,439.36 : x
  2. Step 2: Convert to fraction form
    18,129.28/27,195.20 = 6,439.36/x
  3. Step 3: Cross multiply
    18,129.28x = 27,195.20 × 6,439.36
  4. Step 4: Simplify right side
    18,129.28x = 175,119,683.07
  5. Step 5: Solve for x
    x = 175,119,683.07/18,129.28
  6. Step 6: Final answer
    x = 9,659.49

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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.