Home / 21,681.76-29,919.39-12,249.72

Finding the Fourth Proportional to 21,681.76, 29,919.39 and 12,249.72

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Solution

The fourth proportional to 21,681.76, 29,919.39 and 12,249.72 is: 16,903.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,681.76 : 29,919.39 = 12,249.72 : x
  2. Step 2: Convert to fraction form
    21,681.76/29,919.39 = 12,249.72/x
  3. Step 3: Cross multiply
    21,681.76x = 29,919.39 × 12,249.72
  4. Step 4: Simplify right side
    21,681.76x = 366,504,150.07
  5. Step 5: Solve for x
    x = 366,504,150.07/21,681.76
  6. Step 6: Final answer
    x = 16,903.80

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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.