Home / 20,863.10-28,790.70-11,431.46

Finding the Fourth Proportional to 20,863.10, 28,790.70 and 11,431.46

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Solution

The fourth proportional to 20,863.10, 28,790.70 and 11,431.46 is: 15,775.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,863.10 : 28,790.70 = 11,431.46 : x
  2. Step 2: Convert to fraction form
    20,863.10/28,790.70 = 11,431.46/x
  3. Step 3: Cross multiply
    20,863.10x = 28,790.70 × 11,431.46
  4. Step 4: Simplify right side
    20,863.10x = 329,119,735.42
  5. Step 5: Solve for x
    x = 329,119,735.42/20,863.10
  6. Step 6: Final answer
    x = 15,775.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.