Home / 20,400.89-30,610.73-9,310.97

Finding the Fourth Proportional to 20,400.89, 30,610.73 and 9,310.97

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Solution

The fourth proportional to 20,400.89, 30,610.73 and 9,310.97 is: 13,970.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.89 : 30,610.73 = 9,310.97 : x
  2. Step 2: Convert to fraction form
    20,400.89/30,610.73 = 9,310.97/x
  3. Step 3: Cross multiply
    20,400.89x = 30,610.73 × 9,310.97
  4. Step 4: Simplify right side
    20,400.89x = 285,015,688.51
  5. Step 5: Solve for x
    x = 285,015,688.51/20,400.89
  6. Step 6: Final answer
    x = 13,970.75

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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.