Home / 20,917.89-31,376.77-9,824.53

Finding the Fourth Proportional to 20,917.89, 31,376.77 and 9,824.53

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Solution

The fourth proportional to 20,917.89, 31,376.77 and 9,824.53 is: 14,736.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,917.89 : 31,376.77 = 9,824.53 : x
  2. Step 2: Convert to fraction form
    20,917.89/31,376.77 = 9,824.53/x
  3. Step 3: Cross multiply
    20,917.89x = 31,376.77 × 9,824.53
  4. Step 4: Simplify right side
    20,917.89x = 308,262,018.17
  5. Step 5: Solve for x
    x = 308,262,018.17/20,917.89
  6. Step 6: Final answer
    x = 14,736.76

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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.