Home / 21,223.73-29,290.49-13,685.75

Finding the Fourth Proportional to 21,223.73, 29,290.49 and 13,685.75

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Solution

The fourth proportional to 21,223.73, 29,290.49 and 13,685.75 is: 18,887.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,223.73 : 29,290.49 = 13,685.75 : x
  2. Step 2: Convert to fraction form
    21,223.73/29,290.49 = 13,685.75/x
  3. Step 3: Cross multiply
    21,223.73x = 29,290.49 × 13,685.75
  4. Step 4: Simplify right side
    21,223.73x = 400,862,255.09
  5. Step 5: Solve for x
    x = 400,862,255.09/21,223.73
  6. Step 6: Final answer
    x = 18,887.46

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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.