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Finding the Fourth Proportional to 27,321.91, 37,703.87 and 15,385.39

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Solution

The fourth proportional to 27,321.91, 37,703.87 and 15,385.39 is: 21,231.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,321.91 : 37,703.87 = 15,385.39 : x
  2. Step 2: Convert to fraction form
    27,321.91/37,703.87 = 15,385.39/x
  3. Step 3: Cross multiply
    27,321.91x = 37,703.87 × 15,385.39
  4. Step 4: Simplify right side
    27,321.91x = 580,088,667.53
  5. Step 5: Solve for x
    x = 580,088,667.53/27,321.91
  6. Step 6: Final answer
    x = 21,231.63

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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.