Home / 21,126.80-29,169.24-18,881.48

Finding the Fourth Proportional to 21,126.80, 29,169.24 and 18,881.48

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Solution

The fourth proportional to 21,126.80, 29,169.24 and 18,881.48 is: 26,069.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.80 : 29,169.24 = 18,881.48 : x
  2. Step 2: Convert to fraction form
    21,126.80/29,169.24 = 18,881.48/x
  3. Step 3: Cross multiply
    21,126.80x = 29,169.24 × 18,881.48
  4. Step 4: Simplify right side
    21,126.80x = 550,758,421.68
  5. Step 5: Solve for x
    x = 550,758,421.68/21,126.80
  6. Step 6: Final answer
    x = 26,069.18

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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.