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Finding the Fourth Proportional to 30,349.76, 41,889.12 and 20,408

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Solution

The fourth proportional to 30,349.76, 41,889.12 and 20,408 is: 28,167.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,349.76 : 41,889.12 = 20,408 : x
  2. Step 2: Convert to fraction form
    30,349.76/41,889.12 = 20,408/x
  3. Step 3: Cross multiply
    30,349.76x = 41,889.12 × 20,408
  4. Step 4: Simplify right side
    30,349.76x = 854,873,160.96
  5. Step 5: Solve for x
    x = 854,873,160.96/30,349.76
  6. Step 6: Final answer
    x = 28,167.38

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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.