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Finding the Fourth Proportional to 26,779.80, 40,212.90 and 20,213.40

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Solution

The fourth proportional to 26,779.80, 40,212.90 and 20,213.40 is: 30,352.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,779.80 : 40,212.90 = 20,213.40 : x
  2. Step 2: Convert to fraction form
    26,779.80/40,212.90 = 20,213.40/x
  3. Step 3: Cross multiply
    26,779.80x = 40,212.90 × 20,213.40
  4. Step 4: Simplify right side
    26,779.80x = 812,839,432.86
  5. Step 5: Solve for x
    x = 812,839,432.86/26,779.80
  6. Step 6: Final answer
    x = 30,352.71

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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.