Home / 21,309.90-29,407.05-11,878.26

Finding the Fourth Proportional to 21,309.90, 29,407.05 and 11,878.26

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Solution

The fourth proportional to 21,309.90, 29,407.05 and 11,878.26 is: 16,391.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.90 : 29,407.05 = 11,878.26 : x
  2. Step 2: Convert to fraction form
    21,309.90/29,407.05 = 11,878.26/x
  3. Step 3: Cross multiply
    21,309.90x = 29,407.05 × 11,878.26
  4. Step 4: Simplify right side
    21,309.90x = 349,304,585.73
  5. Step 5: Solve for x
    x = 349,304,585.73/21,309.90
  6. Step 6: Final answer
    x = 16,391.66

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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.