Home / 20,892.42-31,316.76-9,789.75

Finding the Fourth Proportional to 20,892.42, 31,316.76 and 9,789.75

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Solution

The fourth proportional to 20,892.42, 31,316.76 and 9,789.75 is: 14,674.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,892.42 : 31,316.76 = 9,789.75 : x
  2. Step 2: Convert to fraction form
    20,892.42/31,316.76 = 9,789.75/x
  3. Step 3: Cross multiply
    20,892.42x = 31,316.76 × 9,789.75
  4. Step 4: Simplify right side
    20,892.42x = 306,583,251.21
  5. Step 5: Solve for x
    x = 306,583,251.21/20,892.42
  6. Step 6: Final answer
    x = 14,674.38

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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.