Home / 20,617.40-30,930.89-8,771.82

Finding the Fourth Proportional to 20,617.40, 30,930.89 and 8,771.82

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Solution

The fourth proportional to 20,617.40, 30,930.89 and 8,771.82 is: 13,159.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.40 : 30,930.89 = 8,771.82 : x
  2. Step 2: Convert to fraction form
    20,617.40/30,930.89 = 8,771.82/x
  3. Step 3: Cross multiply
    20,617.40x = 30,930.89 × 8,771.82
  4. Step 4: Simplify right side
    20,617.40x = 271,320,199.52
  5. Step 5: Solve for x
    x = 271,320,199.52/20,617.40
  6. Step 6: Final answer
    x = 13,159.77

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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.