Home / 20,930.72-31,382.64-9,822.56

Finding the Fourth Proportional to 20,930.72, 31,382.64 and 9,822.56

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Solution

The fourth proportional to 20,930.72, 31,382.64 and 9,822.56 is: 14,727.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.72 : 31,382.64 = 9,822.56 : x
  2. Step 2: Convert to fraction form
    20,930.72/31,382.64 = 9,822.56/x
  3. Step 3: Cross multiply
    20,930.72x = 31,382.64 × 9,822.56
  4. Step 4: Simplify right side
    20,930.72x = 308,257,864.36
  5. Step 5: Solve for x
    x = 308,257,864.36/20,930.72
  6. Step 6: Final answer
    x = 14,727.53

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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.