Home / 13,981.88-20,972.82-11,511.51

Finding the Fourth Proportional to 13,981.88, 20,972.82 and 11,511.51

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Solution

The fourth proportional to 13,981.88, 20,972.82 and 11,511.51 is: 17,267.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,981.88 : 20,972.82 = 11,511.51 : x
  2. Step 2: Convert to fraction form
    13,981.88/20,972.82 = 11,511.51/x
  3. Step 3: Cross multiply
    13,981.88x = 20,972.82 × 11,511.51
  4. Step 4: Simplify right side
    13,981.88x = 241,428,827.16
  5. Step 5: Solve for x
    x = 241,428,827.16/13,981.88
  6. Step 6: Final answer
    x = 17,267.27

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1.5x scale

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.