Home / 21,645.09-29,871-12,569.79

Finding the Fourth Proportional to 21,645.09, 29,871 and 12,569.79

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Solution

The fourth proportional to 21,645.09, 29,871 and 12,569.79 is: 17,346.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,645.09 : 29,871 = 12,569.79 : x
  2. Step 2: Convert to fraction form
    21,645.09/29,871 = 12,569.79/x
  3. Step 3: Cross multiply
    21,645.09x = 29,871 × 12,569.79
  4. Step 4: Simplify right side
    21,645.09x = 375,472,197.09
  5. Step 5: Solve for x
    x = 375,472,197.09/21,645.09
  6. Step 6: Final answer
    x = 17,346.76

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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.