Home / 20,889.79-31,342.89-9,194.81

Finding the Fourth Proportional to 20,889.79, 31,342.89 and 9,194.81

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Solution

The fourth proportional to 20,889.79, 31,342.89 and 9,194.81 is: 13,795.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.79 : 31,342.89 = 9,194.81 : x
  2. Step 2: Convert to fraction form
    20,889.79/31,342.89 = 9,194.81/x
  3. Step 3: Cross multiply
    20,889.79x = 31,342.89 × 9,194.81
  4. Step 4: Simplify right side
    20,889.79x = 288,191,918.40
  5. Step 5: Solve for x
    x = 288,191,918.40/20,889.79
  6. Step 6: Final answer
    x = 13,795.83

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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.