Home / 21,078.72-29,089.80-11,647.08

Finding the Fourth Proportional to 21,078.72, 29,089.80 and 11,647.08

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Solution

The fourth proportional to 21,078.72, 29,089.80 and 11,647.08 is: 16,073.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,078.72 : 29,089.80 = 11,647.08 : x
  2. Step 2: Convert to fraction form
    21,078.72/29,089.80 = 11,647.08/x
  3. Step 3: Cross multiply
    21,078.72x = 29,089.80 × 11,647.08
  4. Step 4: Simplify right side
    21,078.72x = 338,811,227.78
  5. Step 5: Solve for x
    x = 338,811,227.78/21,078.72
  6. Step 6: Final answer
    x = 16,073.61

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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.