Home / 21,229.08-29,298.42-12,276.42

Finding the Fourth Proportional to 21,229.08, 29,298.42 and 12,276.42

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Solution

The fourth proportional to 21,229.08, 29,298.42 and 12,276.42 is: 16,942.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,229.08 : 29,298.42 = 12,276.42 : x
  2. Step 2: Convert to fraction form
    21,229.08/29,298.42 = 12,276.42/x
  3. Step 3: Cross multiply
    21,229.08x = 29,298.42 × 12,276.42
  4. Step 4: Simplify right side
    21,229.08x = 359,679,709.26
  5. Step 5: Solve for x
    x = 359,679,709.26/21,229.08
  6. Step 6: Final answer
    x = 16,942.78

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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.