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Finding the Fourth Proportional to 27,703.69, 38,231.39 and 15,128.44

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Solution

The fourth proportional to 27,703.69, 38,231.39 and 15,128.44 is: 20,877.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,703.69 : 38,231.39 = 15,128.44 : x
  2. Step 2: Convert to fraction form
    27,703.69/38,231.39 = 15,128.44/x
  3. Step 3: Cross multiply
    27,703.69x = 38,231.39 × 15,128.44
  4. Step 4: Simplify right side
    27,703.69x = 578,381,231.97
  5. Step 5: Solve for x
    x = 578,381,231.97/27,703.69
  6. Step 6: Final answer
    x = 20,877.41

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Double scale
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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.