Home / 21,388.44-29,516.70-11,957.40

Finding the Fourth Proportional to 21,388.44, 29,516.70 and 11,957.40

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Solution

The fourth proportional to 21,388.44, 29,516.70 and 11,957.40 is: 16,501.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,388.44 : 29,516.70 = 11,957.40 : x
  2. Step 2: Convert to fraction form
    21,388.44/29,516.70 = 11,957.40/x
  3. Step 3: Cross multiply
    21,388.44x = 29,516.70 × 11,957.40
  4. Step 4: Simplify right side
    21,388.44x = 352,942,988.58
  5. Step 5: Solve for x
    x = 352,942,988.58/21,388.44
  6. Step 6: Final answer
    x = 16,501.58

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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.