Home / 21,078.90-29,087.62-11,516.88

Finding the Fourth Proportional to 21,078.90, 29,087.62 and 11,516.88

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Solution

The fourth proportional to 21,078.90, 29,087.62 and 11,516.88 is: 15,892.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.90 : 29,087.62 = 11,516.88 : x
  2. Step 2: Convert to fraction form
    21,078.90/29,087.62 = 11,516.88/x
  3. Step 3: Cross multiply
    21,078.90x = 29,087.62 × 11,516.88
  4. Step 4: Simplify right side
    21,078.90x = 334,998,629.03
  5. Step 5: Solve for x
    x = 334,998,629.03/21,078.90
  6. Step 6: Final answer
    x = 15,892.60

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1.5x scale

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.