Home / 21,221.53-29,290.12-12,267.79

Finding the Fourth Proportional to 21,221.53, 29,290.12 and 12,267.79

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Solution

The fourth proportional to 21,221.53, 29,290.12 and 12,267.79 is: 16,932.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,221.53 : 29,290.12 = 12,267.79 : x
  2. Step 2: Convert to fraction form
    21,221.53/29,290.12 = 12,267.79/x
  3. Step 3: Cross multiply
    21,221.53x = 29,290.12 × 12,267.79
  4. Step 4: Simplify right side
    21,221.53x = 359,324,937.34
  5. Step 5: Solve for x
    x = 359,324,937.34/21,221.53
  6. Step 6: Final answer
    x = 16,932.10

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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.