Home / 21,318.29-29,421-11,760.05

Finding the Fourth Proportional to 21,318.29, 29,421 and 11,760.05

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Solution

The fourth proportional to 21,318.29, 29,421 and 11,760.05 is: 16,229.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.29 : 29,421 = 11,760.05 : x
  2. Step 2: Convert to fraction form
    21,318.29/29,421 = 11,760.05/x
  3. Step 3: Cross multiply
    21,318.29x = 29,421 × 11,760.05
  4. Step 4: Simplify right side
    21,318.29x = 345,992,431.05
  5. Step 5: Solve for x
    x = 345,992,431.05/21,318.29
  6. Step 6: Final answer
    x = 16,229.84

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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.