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Finding the Fourth Proportional to 27,978.96, 38,610.84 and 15,403.70

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Solution

The fourth proportional to 27,978.96, 38,610.84 and 15,403.70 is: 21,257.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,978.96 : 38,610.84 = 15,403.70 : x
  2. Step 2: Convert to fraction form
    27,978.96/38,610.84 = 15,403.70/x
  3. Step 3: Cross multiply
    27,978.96x = 38,610.84 × 15,403.70
  4. Step 4: Simplify right side
    27,978.96x = 594,749,796.11
  5. Step 5: Solve for x
    x = 594,749,796.11/27,978.96
  6. Step 6: Final answer
    x = 21,257.04

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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.