Home / 13,218.48-19,789.29-10,287.90

Finding the Fourth Proportional to 13,218.48, 19,789.29 and 10,287.90

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Solution

The fourth proportional to 13,218.48, 19,789.29 and 10,287.90 is: 15,401.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,218.48 : 19,789.29 = 10,287.90 : x
  2. Step 2: Convert to fraction form
    13,218.48/19,789.29 = 10,287.90/x
  3. Step 3: Cross multiply
    13,218.48x = 19,789.29 × 10,287.90
  4. Step 4: Simplify right side
    13,218.48x = 203,590,236.59
  5. Step 5: Solve for x
    x = 203,590,236.59/13,218.48
  6. Step 6: Final answer
    x = 15,401.94

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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.