Home / 20,619.36-30,900.24-10,220.64

Finding the Fourth Proportional to 20,619.36, 30,900.24 and 10,220.64

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Solution

The fourth proportional to 20,619.36, 30,900.24 and 10,220.64 is: 15,316.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.36 : 30,900.24 = 10,220.64 : x
  2. Step 2: Convert to fraction form
    20,619.36/30,900.24 = 10,220.64/x
  3. Step 3: Cross multiply
    20,619.36x = 30,900.24 × 10,220.64
  4. Step 4: Simplify right side
    20,619.36x = 315,820,228.95
  5. Step 5: Solve for x
    x = 315,820,228.95/20,619.36
  6. Step 6: Final answer
    x = 15,316.68

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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.