Home / 20,128.10-30,224.55-15,203.30

Finding the Fourth Proportional to 20,128.10, 30,224.55 and 15,203.30

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Solution

The fourth proportional to 20,128.10, 30,224.55 and 15,203.30 is: 22,829.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.10 : 30,224.55 = 15,203.30 : x
  2. Step 2: Convert to fraction form
    20,128.10/30,224.55 = 15,203.30/x
  3. Step 3: Cross multiply
    20,128.10x = 30,224.55 × 15,203.30
  4. Step 4: Simplify right side
    20,128.10x = 459,512,901.02
  5. Step 5: Solve for x
    x = 459,512,901.02/20,128.10
  6. Step 6: Final answer
    x = 22,829.42

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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.