Home / 21,334.56-29,439.36-12,380.55

Finding the Fourth Proportional to 21,334.56, 29,439.36 and 12,380.55

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Solution

The fourth proportional to 21,334.56, 29,439.36 and 12,380.55 is: 17,083.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,334.56 : 29,439.36 = 12,380.55 : x
  2. Step 2: Convert to fraction form
    21,334.56/29,439.36 = 12,380.55/x
  3. Step 3: Cross multiply
    21,334.56x = 29,439.36 × 12,380.55
  4. Step 4: Simplify right side
    21,334.56x = 364,475,468.45
  5. Step 5: Solve for x
    x = 364,475,468.45/21,334.56
  6. Step 6: Final answer
    x = 17,083.81

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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.