Home / 21,313.86-31,986.60-17,203.14

Finding the Fourth Proportional to 21,313.86, 31,986.60 and 17,203.14

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Solution

The fourth proportional to 21,313.86, 31,986.60 and 17,203.14 is: 25,817.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,313.86 : 31,986.60 = 17,203.14 : x
  2. Step 2: Convert to fraction form
    21,313.86/31,986.60 = 17,203.14/x
  3. Step 3: Cross multiply
    21,313.86x = 31,986.60 × 17,203.14
  4. Step 4: Simplify right side
    21,313.86x = 550,269,957.92
  5. Step 5: Solve for x
    x = 550,269,957.92/21,313.86
  6. Step 6: Final answer
    x = 25,817.47

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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.