Home / 13,615.86-20,418.57-5,294.79

Finding the Fourth Proportional to 13,615.86, 20,418.57 and 5,294.79

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Solution

The fourth proportional to 13,615.86, 20,418.57 and 5,294.79 is: 7,940.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,615.86 : 20,418.57 = 5,294.79 : x
  2. Step 2: Convert to fraction form
    13,615.86/20,418.57 = 5,294.79/x
  3. Step 3: Cross multiply
    13,615.86x = 20,418.57 × 5,294.79
  4. Step 4: Simplify right side
    13,615.86x = 108,112,040.25
  5. Step 5: Solve for x
    x = 108,112,040.25/13,615.86
  6. Step 6: Final answer
    x = 7,940.16

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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.