Home / 21,331.32-29,438.47-12,375.55

Finding the Fourth Proportional to 21,331.32, 29,438.47 and 12,375.55

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Solution

The fourth proportional to 21,331.32, 29,438.47 and 12,375.55 is: 17,078.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331.32 : 29,438.47 = 12,375.55 : x
  2. Step 2: Convert to fraction form
    21,331.32/29,438.47 = 12,375.55/x
  3. Step 3: Cross multiply
    21,331.32x = 29,438.47 × 12,375.55
  4. Step 4: Simplify right side
    21,331.32x = 364,317,257.41
  5. Step 5: Solve for x
    x = 364,317,257.41/21,331.32
  6. Step 6: Final answer
    x = 17,078.98

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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.