Home / 21,722.08-29,977.64-13,222.85

Finding the Fourth Proportional to 21,722.08, 29,977.64 and 13,222.85

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Solution

The fourth proportional to 21,722.08, 29,977.64 and 13,222.85 is: 18,248.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,722.08 : 29,977.64 = 13,222.85 : x
  2. Step 2: Convert to fraction form
    21,722.08/29,977.64 = 13,222.85/x
  3. Step 3: Cross multiply
    21,722.08x = 29,977.64 × 13,222.85
  4. Step 4: Simplify right side
    21,722.08x = 396,389,770.96
  5. Step 5: Solve for x
    x = 396,389,770.96/21,722.08
  6. Step 6: Final answer
    x = 18,248.25

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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.