Home / 21,148.40-29,186.31-11,717.60

Finding the Fourth Proportional to 21,148.40, 29,186.31 and 11,717.60

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Solution

The fourth proportional to 21,148.40, 29,186.31 and 11,717.60 is: 16,171.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,148.40 : 29,186.31 = 11,717.60 : x
  2. Step 2: Convert to fraction form
    21,148.40/29,186.31 = 11,717.60/x
  3. Step 3: Cross multiply
    21,148.40x = 29,186.31 × 11,717.60
  4. Step 4: Simplify right side
    21,148.40x = 341,993,506.06
  5. Step 5: Solve for x
    x = 341,993,506.06/21,148.40
  6. Step 6: Final answer
    x = 16,171.13

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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.