Home / 21,540.36-29,716.56-13,152

Finding the Fourth Proportional to 21,540.36, 29,716.56 and 13,152

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Solution

The fourth proportional to 21,540.36, 29,716.56 and 13,152 is: 18,144.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,540.36 : 29,716.56 = 13,152 : x
  2. Step 2: Convert to fraction form
    21,540.36/29,716.56 = 13,152/x
  3. Step 3: Cross multiply
    21,540.36x = 29,716.56 × 13,152
  4. Step 4: Simplify right side
    21,540.36x = 390,832,197.12
  5. Step 5: Solve for x
    x = 390,832,197.12/21,540.36
  6. Step 6: Final answer
    x = 18,144.18

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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.