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Finding the Fourth Proportional to 30,355.28, 41,878.08 and 18,414.28

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Solution

The fourth proportional to 30,355.28, 41,878.08 and 18,414.28 is: 25,404.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,355.28 : 41,878.08 = 18,414.28 : x
  2. Step 2: Convert to fraction form
    30,355.28/41,878.08 = 18,414.28/x
  3. Step 3: Cross multiply
    30,355.28x = 41,878.08 × 18,414.28
  4. Step 4: Simplify right side
    30,355.28x = 771,154,690.98
  5. Step 5: Solve for x
    x = 771,154,690.98/30,355.28
  6. Step 6: Final answer
    x = 25,404.30

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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.