Home / 31,742.08-43,806.90-20,438.58

Finding the Fourth Proportional to 31,742.08, 43,806.90 and 20,438.58

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Solution

The fourth proportional to 31,742.08, 43,806.90 and 20,438.58 is: 28,207.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,742.08 : 43,806.90 = 20,438.58 : x
  2. Step 2: Convert to fraction form
    31,742.08/43,806.90 = 20,438.58/x
  3. Step 3: Cross multiply
    31,742.08x = 43,806.90 × 20,438.58
  4. Step 4: Simplify right side
    31,742.08x = 895,350,830.20
  5. Step 5: Solve for x
    x = 895,350,830.20/31,742.08
  6. Step 6: Final answer
    x = 28,207.06

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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.