Home / 21,687.09-29,904.42-14,119.47

Finding the Fourth Proportional to 21,687.09, 29,904.42 and 14,119.47

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Solution

The fourth proportional to 21,687.09, 29,904.42 and 14,119.47 is: 19,469.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,687.09 : 29,904.42 = 14,119.47 : x
  2. Step 2: Convert to fraction form
    21,687.09/29,904.42 = 14,119.47/x
  3. Step 3: Cross multiply
    21,687.09x = 29,904.42 × 14,119.47
  4. Step 4: Simplify right side
    21,687.09x = 422,234,561.06
  5. Step 5: Solve for x
    x = 422,234,561.06/21,687.09
  6. Step 6: Final answer
    x = 19,469.40

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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.