Home / 21,078.07-29,088.12-11,517.91

Finding the Fourth Proportional to 21,078.07, 29,088.12 and 11,517.91

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Solution

The fourth proportional to 21,078.07, 29,088.12 and 11,517.91 is: 15,894.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.07 : 29,088.12 = 11,517.91 : x
  2. Step 2: Convert to fraction form
    21,078.07/29,088.12 = 11,517.91/x
  3. Step 3: Cross multiply
    21,078.07x = 29,088.12 × 11,517.91
  4. Step 4: Simplify right side
    21,078.07x = 335,034,348.23
  5. Step 5: Solve for x
    x = 335,034,348.23/21,078.07
  6. Step 6: Final answer
    x = 15,894.93

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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.