Home / 20,775.15-31,171.82-10,912.19

Finding the Fourth Proportional to 20,775.15, 31,171.82 and 10,912.19

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Solution

The fourth proportional to 20,775.15, 31,171.82 and 10,912.19 is: 16,373.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,775.15 : 31,171.82 = 10,912.19 : x
  2. Step 2: Convert to fraction form
    20,775.15/31,171.82 = 10,912.19/x
  3. Step 3: Cross multiply
    20,775.15x = 31,171.82 × 10,912.19
  4. Step 4: Simplify right side
    20,775.15x = 340,152,612.07
  5. Step 5: Solve for x
    x = 340,152,612.07/20,775.15
  6. Step 6: Final answer
    x = 16,373.05

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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.