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Finding the Fourth Proportional to 19,978.58, 27,571.34 and 11,483.46

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Solution

The fourth proportional to 19,978.58, 27,571.34 and 11,483.46 is: 15,847.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,978.58 : 27,571.34 = 11,483.46 : x
  2. Step 2: Convert to fraction form
    19,978.58/27,571.34 = 11,483.46/x
  3. Step 3: Cross multiply
    19,978.58x = 27,571.34 × 11,483.46
  4. Step 4: Simplify right side
    19,978.58x = 316,614,408.75
  5. Step 5: Solve for x
    x = 316,614,408.75/19,978.58
  6. Step 6: Final answer
    x = 15,847.69

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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.