Home / 21,331.90-29,439.48-12,379.42

Finding the Fourth Proportional to 21,331.90, 29,439.48 and 12,379.42

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Solution

The fourth proportional to 21,331.90, 29,439.48 and 12,379.42 is: 17,084.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,331.90 : 29,439.48 = 12,379.42 : x
  2. Step 2: Convert to fraction form
    21,331.90/29,439.48 = 12,379.42/x
  3. Step 3: Cross multiply
    21,331.90x = 29,439.48 × 12,379.42
  4. Step 4: Simplify right side
    21,331.90x = 364,443,687.50
  5. Step 5: Solve for x
    x = 364,443,687.50/21,331.90
  6. Step 6: Final answer
    x = 17,084.45

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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.