Home / 21,739.86-29,993.94-12,306.60

Finding the Fourth Proportional to 21,739.86, 29,993.94 and 12,306.60

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Solution

The fourth proportional to 21,739.86, 29,993.94 and 12,306.60 is: 16,979.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,739.86 : 29,993.94 = 12,306.60 : x
  2. Step 2: Convert to fraction form
    21,739.86/29,993.94 = 12,306.60/x
  3. Step 3: Cross multiply
    21,739.86x = 29,993.94 × 12,306.60
  4. Step 4: Simplify right side
    21,739.86x = 369,123,422.00
  5. Step 5: Solve for x
    x = 369,123,422.00/21,739.86
  6. Step 6: Final answer
    x = 16,979.11

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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.