Home / 21,078.29-29,087.80-11,646.86

Finding the Fourth Proportional to 21,078.29, 29,087.80 and 11,646.86

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Solution

The fourth proportional to 21,078.29, 29,087.80 and 11,646.86 is: 16,072.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.29 : 29,087.80 = 11,646.86 : x
  2. Step 2: Convert to fraction form
    21,078.29/29,087.80 = 11,646.86/x
  3. Step 3: Cross multiply
    21,078.29x = 29,087.80 × 11,646.86
  4. Step 4: Simplify right side
    21,078.29x = 338,781,359.75
  5. Step 5: Solve for x
    x = 338,781,359.75/21,078.29
  6. Step 6: Final answer
    x = 16,072.52

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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.