Home / 31,738.46-43,779.28-20,422.72

Finding the Fourth Proportional to 31,738.46, 43,779.28 and 20,422.72

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Solution

The fourth proportional to 31,738.46, 43,779.28 and 20,422.72 is: 28,170.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,738.46 : 43,779.28 = 20,422.72 : x
  2. Step 2: Convert to fraction form
    31,738.46/43,779.28 = 20,422.72/x
  3. Step 3: Cross multiply
    31,738.46x = 43,779.28 × 20,422.72
  4. Step 4: Simplify right side
    31,738.46x = 894,091,977.24
  5. Step 5: Solve for x
    x = 894,091,977.24/31,738.46
  6. Step 6: Final answer
    x = 28,170.62

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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.