Home / 21,321.25-29,424.12-11,891.63

Finding the Fourth Proportional to 21,321.25, 29,424.12 and 11,891.63

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Solution

The fourth proportional to 21,321.25, 29,424.12 and 11,891.63 is: 16,410.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,321.25 : 29,424.12 = 11,891.63 : x
  2. Step 2: Convert to fraction form
    21,321.25/29,424.12 = 11,891.63/x
  3. Step 3: Cross multiply
    21,321.25x = 29,424.12 × 11,891.63
  4. Step 4: Simplify right side
    21,321.25x = 349,900,748.12
  5. Step 5: Solve for x
    x = 349,900,748.12/21,321.25
  6. Step 6: Final answer
    x = 16,410.89

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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.