Home / 30,171.15-45,212.18-21,868.65

Finding the Fourth Proportional to 30,171.15, 45,212.18 and 21,868.65

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Solution

The fourth proportional to 30,171.15, 45,212.18 and 21,868.65 is: 32,770.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,171.15 : 45,212.18 = 21,868.65 : x
  2. Step 2: Convert to fraction form
    30,171.15/45,212.18 = 21,868.65/x
  3. Step 3: Cross multiply
    30,171.15x = 45,212.18 × 21,868.65
  4. Step 4: Simplify right side
    30,171.15x = 988,729,230.81
  5. Step 5: Solve for x
    x = 988,729,230.81/30,171.15
  6. Step 6: Final answer
    x = 32,770.68

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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.