Home / 21,131.52-29,161.89-12,177.51

Finding the Fourth Proportional to 21,131.52, 29,161.89 and 12,177.51

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Solution

The fourth proportional to 21,131.52, 29,161.89 and 12,177.51 is: 16,805.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,131.52 : 29,161.89 = 12,177.51 : x
  2. Step 2: Convert to fraction form
    21,131.52/29,161.89 = 12,177.51/x
  3. Step 3: Cross multiply
    21,131.52x = 29,161.89 × 12,177.51
  4. Step 4: Simplify right side
    21,131.52x = 355,119,207.09
  5. Step 5: Solve for x
    x = 355,119,207.09/21,131.52
  6. Step 6: Final answer
    x = 16,805.19

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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.