Home / 21,272.82-29,356.02-13,319.44

Finding the Fourth Proportional to 21,272.82, 29,356.02 and 13,319.44

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Solution

The fourth proportional to 21,272.82, 29,356.02 and 13,319.44 is: 18,380.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,272.82 : 29,356.02 = 13,319.44 : x
  2. Step 2: Convert to fraction form
    21,272.82/29,356.02 = 13,319.44/x
  3. Step 3: Cross multiply
    21,272.82x = 29,356.02 × 13,319.44
  4. Step 4: Simplify right side
    21,272.82x = 391,005,747.03
  5. Step 5: Solve for x
    x = 391,005,747.03/21,272.82
  6. Step 6: Final answer
    x = 18,380.53

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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.