Home / 21,071.10-29,078.81-11,511.91

Finding the Fourth Proportional to 21,071.10, 29,078.81 and 11,511.91

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Solution

The fourth proportional to 21,071.10, 29,078.81 and 11,511.91 is: 15,886.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.10 : 29,078.81 = 11,511.91 : x
  2. Step 2: Convert to fraction form
    21,071.10/29,078.81 = 11,511.91/x
  3. Step 3: Cross multiply
    21,071.10x = 29,078.81 × 11,511.91
  4. Step 4: Simplify right side
    21,071.10x = 334,752,585.30
  5. Step 5: Solve for x
    x = 334,752,585.30/21,071.10
  6. Step 6: Final answer
    x = 15,886.81

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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.