Home / 21,144.48-29,178.12-11,712.36

Finding the Fourth Proportional to 21,144.48, 29,178.12 and 11,712.36

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Solution

The fourth proportional to 21,144.48, 29,178.12 and 11,712.36 is: 16,162.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,144.48 : 29,178.12 = 11,712.36 : x
  2. Step 2: Convert to fraction form
    21,144.48/29,178.12 = 11,712.36/x
  3. Step 3: Cross multiply
    21,144.48x = 29,178.12 × 11,712.36
  4. Step 4: Simplify right side
    21,144.48x = 341,744,645.56
  5. Step 5: Solve for x
    x = 341,744,645.56/21,144.48
  6. Step 6: Final answer
    x = 16,162.36

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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.