Home / 21,628.20-29,841.78-12,196.77

Finding the Fourth Proportional to 21,628.20, 29,841.78 and 12,196.77

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Solution

The fourth proportional to 21,628.20, 29,841.78 and 12,196.77 is: 16,828.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,628.20 : 29,841.78 = 12,196.77 : x
  2. Step 2: Convert to fraction form
    21,628.20/29,841.78 = 12,196.77/x
  3. Step 3: Cross multiply
    21,628.20x = 29,841.78 × 12,196.77
  4. Step 4: Simplify right side
    21,628.20x = 363,973,327.05
  5. Step 5: Solve for x
    x = 363,973,327.05/21,628.20
  6. Step 6: Final answer
    x = 16,828.65

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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.