Home / 28,157.83-38,863.20-20,113.32

Finding the Fourth Proportional to 28,157.83, 38,863.20 and 20,113.32

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Solution

The fourth proportional to 28,157.83, 38,863.20 and 20,113.32 is: 27,760.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,157.83 : 38,863.20 = 20,113.32 : x
  2. Step 2: Convert to fraction form
    28,157.83/38,863.20 = 20,113.32/x
  3. Step 3: Cross multiply
    28,157.83x = 38,863.20 × 20,113.32
  4. Step 4: Simplify right side
    28,157.83x = 781,667,977.82
  5. Step 5: Solve for x
    x = 781,667,977.82/28,157.83
  6. Step 6: Final answer
    x = 27,760.23

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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.