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Finding the Fourth Proportional to 55,015.20, 82,555.20 and 19,958.40

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Solution

The fourth proportional to 55,015.20, 82,555.20 and 19,958.40 is: 29,949.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    55,015.20 : 82,555.20 = 19,958.40 : x
  2. Step 2: Convert to fraction form
    55,015.20/82,555.20 = 19,958.40/x
  3. Step 3: Cross multiply
    55,015.20x = 82,555.20 × 19,958.40
  4. Step 4: Simplify right side
    55,015.20x = 1,647,669,703.68
  5. Step 5: Solve for x
    x = 1,647,669,703.68/55,015.20
  6. Step 6: Final answer
    x = 29,949.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.