Home / 21,643.36-29,868.48-13,255.12

Finding the Fourth Proportional to 21,643.36, 29,868.48 and 13,255.12

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Solution

The fourth proportional to 21,643.36, 29,868.48 and 13,255.12 is: 18,292.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,643.36 : 29,868.48 = 13,255.12 : x
  2. Step 2: Convert to fraction form
    21,643.36/29,868.48 = 13,255.12/x
  3. Step 3: Cross multiply
    21,643.36x = 29,868.48 × 13,255.12
  4. Step 4: Simplify right side
    21,643.36x = 395,910,286.62
  5. Step 5: Solve for x
    x = 395,910,286.62/21,643.36
  6. Step 6: Final answer
    x = 18,292.46

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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.