Home / 30,155.20-45,195.60-21,863.68

Finding the Fourth Proportional to 30,155.20, 45,195.60 and 21,863.68

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Solution

The fourth proportional to 30,155.20, 45,195.60 and 21,863.68 is: 32,768.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,155.20 : 45,195.60 = 21,863.68 : x
  2. Step 2: Convert to fraction form
    30,155.20/45,195.60 = 21,863.68/x
  3. Step 3: Cross multiply
    30,155.20x = 45,195.60 × 21,863.68
  4. Step 4: Simplify right side
    30,155.20x = 988,142,135.81
  5. Step 5: Solve for x
    x = 988,142,135.81/30,155.20
  6. Step 6: Final answer
    x = 32,768.55

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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.