Home / 21,187.36-29,244.27-13,224.79

Finding the Fourth Proportional to 21,187.36, 29,244.27 and 13,224.79

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Solution

The fourth proportional to 21,187.36, 29,244.27 and 13,224.79 is: 18,253.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,187.36 : 29,244.27 = 13,224.79 : x
  2. Step 2: Convert to fraction form
    21,187.36/29,244.27 = 13,224.79/x
  3. Step 3: Cross multiply
    21,187.36x = 29,244.27 × 13,224.79
  4. Step 4: Simplify right side
    21,187.36x = 386,749,329.45
  5. Step 5: Solve for x
    x = 386,749,329.45/21,187.36
  6. Step 6: Final answer
    x = 18,253.78

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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.