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Finding the Fourth Proportional to 27,855, 38,439.99 and 15,108.39

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Solution

The fourth proportional to 27,855, 38,439.99 and 15,108.39 is: 20,849.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,855 : 38,439.99 = 15,108.39 : x
  2. Step 2: Convert to fraction form
    27,855/38,439.99 = 15,108.39/x
  3. Step 3: Cross multiply
    27,855x = 38,439.99 × 15,108.39
  4. Step 4: Simplify right side
    27,855x = 580,766,360.52
  5. Step 5: Solve for x
    x = 580,766,360.52/27,855
  6. Step 6: Final answer
    x = 20,849.63

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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.