Home / 21,144.69-29,178.36-11,713.28

Finding the Fourth Proportional to 21,144.69, 29,178.36 and 11,713.28

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Solution

The fourth proportional to 21,144.69, 29,178.36 and 11,713.28 is: 16,163.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,144.69 : 29,178.36 = 11,713.28 : x
  2. Step 2: Convert to fraction form
    21,144.69/29,178.36 = 11,713.28/x
  3. Step 3: Cross multiply
    21,144.69x = 29,178.36 × 11,713.28
  4. Step 4: Simplify right side
    21,144.69x = 341,774,154.73
  5. Step 5: Solve for x
    x = 341,774,154.73/21,144.69
  6. Step 6: Final answer
    x = 16,163.59

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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.