Home / 21,636.18-29,852.79-13,138.08

Finding the Fourth Proportional to 21,636.18, 29,852.79 and 13,138.08

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Solution

The fourth proportional to 21,636.18, 29,852.79 and 13,138.08 is: 18,127.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,636.18 : 29,852.79 = 13,138.08 : x
  2. Step 2: Convert to fraction form
    21,636.18/29,852.79 = 13,138.08/x
  3. Step 3: Cross multiply
    21,636.18x = 29,852.79 × 13,138.08
  4. Step 4: Simplify right side
    21,636.18x = 392,208,343.24
  5. Step 5: Solve for x
    x = 392,208,343.24/21,636.18
  6. Step 6: Final answer
    x = 18,127.43

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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.