Home / 15,102.72-20,790-13,101.48

Finding the Fourth Proportional to 15,102.72, 20,790 and 13,101.48

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Solution

The fourth proportional to 15,102.72, 20,790 and 13,101.48 is: 18,035.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,102.72 : 20,790 = 13,101.48 : x
  2. Step 2: Convert to fraction form
    15,102.72/20,790 = 13,101.48/x
  3. Step 3: Cross multiply
    15,102.72x = 20,790 × 13,101.48
  4. Step 4: Simplify right side
    15,102.72x = 272,379,769.20
  5. Step 5: Solve for x
    x = 272,379,769.20/15,102.72
  6. Step 6: Final answer
    x = 18,035.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.