Home / 21,117.24-29,142.84-12,166.20

Finding the Fourth Proportional to 21,117.24, 29,142.84 and 12,166.20

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Solution

The fourth proportional to 21,117.24, 29,142.84 and 12,166.20 is: 16,789.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,117.24 : 29,142.84 = 12,166.20 : x
  2. Step 2: Convert to fraction form
    21,117.24/29,142.84 = 12,166.20/x
  3. Step 3: Cross multiply
    21,117.24x = 29,142.84 × 12,166.20
  4. Step 4: Simplify right side
    21,117.24x = 354,557,620.01
  5. Step 5: Solve for x
    x = 354,557,620.01/21,117.24
  6. Step 6: Final answer
    x = 16,789.96

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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.