Home / 20,780.02-31,183.70-7,632.51

Finding the Fourth Proportional to 20,780.02, 31,183.70 and 7,632.51

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Solution

The fourth proportional to 20,780.02, 31,183.70 and 7,632.51 is: 11,453.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,780.02 : 31,183.70 = 7,632.51 : x
  2. Step 2: Convert to fraction form
    20,780.02/31,183.70 = 7,632.51/x
  3. Step 3: Cross multiply
    20,780.02x = 31,183.70 × 7,632.51
  4. Step 4: Simplify right side
    20,780.02x = 238,009,902.09
  5. Step 5: Solve for x
    x = 238,009,902.09/20,780.02
  6. Step 6: Final answer
    x = 11,453.79

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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.