Home / 19,939.78-29,909.91-8,540.17

Finding the Fourth Proportional to 19,939.78, 29,909.91 and 8,540.17

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Solution

The fourth proportional to 19,939.78, 29,909.91 and 8,540.17 is: 12,810.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,939.78 : 29,909.91 = 8,540.17 : x
  2. Step 2: Convert to fraction form
    19,939.78/29,909.91 = 8,540.17/x
  3. Step 3: Cross multiply
    19,939.78x = 29,909.91 × 8,540.17
  4. Step 4: Simplify right side
    19,939.78x = 255,435,716.08
  5. Step 5: Solve for x
    x = 255,435,716.08/19,939.78
  6. Step 6: Final answer
    x = 12,810.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.