Home / 30,781.22-42,466.68-20,176.70

Finding the Fourth Proportional to 30,781.22, 42,466.68 and 20,176.70

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Solution

The fourth proportional to 30,781.22, 42,466.68 and 20,176.70 is: 27,836.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,781.22 : 42,466.68 = 20,176.70 : x
  2. Step 2: Convert to fraction form
    30,781.22/42,466.68 = 20,176.70/x
  3. Step 3: Cross multiply
    30,781.22x = 42,466.68 × 20,176.70
  4. Step 4: Simplify right side
    30,781.22x = 856,837,250.02
  5. Step 5: Solve for x
    x = 856,837,250.02/30,781.22
  6. Step 6: Final answer
    x = 27,836.37

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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.