Home / 21,677.85-29,914.80-12,117.75

Finding the Fourth Proportional to 21,677.85, 29,914.80 and 12,117.75

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Solution

The fourth proportional to 21,677.85, 29,914.80 and 12,117.75 is: 16,722.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,677.85 : 29,914.80 = 12,117.75 : x
  2. Step 2: Convert to fraction form
    21,677.85/29,914.80 = 12,117.75/x
  3. Step 3: Cross multiply
    21,677.85x = 29,914.80 × 12,117.75
  4. Step 4: Simplify right side
    21,677.85x = 362,500,067.70
  5. Step 5: Solve for x
    x = 362,500,067.70/21,677.85
  6. Step 6: Final answer
    x = 16,722.14

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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.