Home / 13,781.88-19,001.79-11,401.74

Finding the Fourth Proportional to 13,781.88, 19,001.79 and 11,401.74

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Solution

The fourth proportional to 13,781.88, 19,001.79 and 11,401.74 is: 15,720.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,781.88 : 19,001.79 = 11,401.74 : x
  2. Step 2: Convert to fraction form
    13,781.88/19,001.79 = 11,401.74/x
  3. Step 3: Cross multiply
    13,781.88x = 19,001.79 × 11,401.74
  4. Step 4: Simplify right side
    13,781.88x = 216,653,469.11
  5. Step 5: Solve for x
    x = 216,653,469.11/13,781.88
  6. Step 6: Final answer
    x = 15,720.17

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1.5x scale

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.