Home / 20,809.19-31,216.89-7,660.56

Finding the Fourth Proportional to 20,809.19, 31,216.89 and 7,660.56

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Solution

The fourth proportional to 20,809.19, 31,216.89 and 7,660.56 is: 11,491.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.19 : 31,216.89 = 7,660.56 : x
  2. Step 2: Convert to fraction form
    20,809.19/31,216.89 = 7,660.56/x
  3. Step 3: Cross multiply
    20,809.19x = 31,216.89 × 7,660.56
  4. Step 4: Simplify right side
    20,809.19x = 239,138,858.86
  5. Step 5: Solve for x
    x = 239,138,858.86/20,809.19
  6. Step 6: Final answer
    x = 11,491.98

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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.