Home / 20,282.10-30,391.79-15,829.21

Finding the Fourth Proportional to 20,282.10, 30,391.79 and 15,829.21

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Solution

The fourth proportional to 20,282.10, 30,391.79 and 15,829.21 is: 23,719.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,282.10 : 30,391.79 = 15,829.21 : x
  2. Step 2: Convert to fraction form
    20,282.10/30,391.79 = 15,829.21/x
  3. Step 3: Cross multiply
    20,282.10x = 30,391.79 × 15,829.21
  4. Step 4: Simplify right side
    20,282.10x = 481,077,989.78
  5. Step 5: Solve for x
    x = 481,077,989.78/20,282.10
  6. Step 6: Final answer
    x = 23,719.34

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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.