Home / 21,168.32-29,208.36-13,712

Finding the Fourth Proportional to 21,168.32, 29,208.36 and 13,712

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Solution

The fourth proportional to 21,168.32, 29,208.36 and 13,712 is: 18,920.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,168.32 : 29,208.36 = 13,712 : x
  2. Step 2: Convert to fraction form
    21,168.32/29,208.36 = 13,712/x
  3. Step 3: Cross multiply
    21,168.32x = 29,208.36 × 13,712
  4. Step 4: Simplify right side
    21,168.32x = 400,505,032.32
  5. Step 5: Solve for x
    x = 400,505,032.32/21,168.32
  6. Step 6: Final answer
    x = 18,920.02

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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.