Home / 20,255.30-30,386.00-7,105.36

Finding the Fourth Proportional to 20,255.30, 30,386.00 and 7,105.36

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Solution

The fourth proportional to 20,255.30, 30,386.00 and 7,105.36 is: 10,659.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,255.30 : 30,386.00 = 7,105.36 : x
  2. Step 2: Convert to fraction form
    20,255.30/30,386.00 = 7,105.36/x
  3. Step 3: Cross multiply
    20,255.30x = 30,386.00 × 7,105.36
  4. Step 4: Simplify right side
    20,255.30x = 215,903,395.45
  5. Step 5: Solve for x
    x = 215,903,395.45/20,255.30
  6. Step 6: Final answer
    x = 10,659.10

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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.