Home / 21,070.78-29,077.32-11,639.14

Finding the Fourth Proportional to 21,070.78, 29,077.32 and 11,639.14

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Solution

The fourth proportional to 21,070.78, 29,077.32 and 11,639.14 is: 16,061.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,070.78 : 29,077.32 = 11,639.14 : x
  2. Step 2: Convert to fraction form
    21,070.78/29,077.32 = 11,639.14/x
  3. Step 3: Cross multiply
    21,070.78x = 29,077.32 × 11,639.14
  4. Step 4: Simplify right side
    21,070.78x = 338,434,998.30
  5. Step 5: Solve for x
    x = 338,434,998.30/21,070.78
  6. Step 6: Final answer
    x = 16,061.82

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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.