Home / 20,774.16-31,161.32-5,191.80

Finding the Fourth Proportional to 20,774.16, 31,161.32 and 5,191.80

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Solution

The fourth proportional to 20,774.16, 31,161.32 and 5,191.80 is: 7,787.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,774.16 : 31,161.32 = 5,191.80 : x
  2. Step 2: Convert to fraction form
    20,774.16/31,161.32 = 5,191.80/x
  3. Step 3: Cross multiply
    20,774.16x = 31,161.32 × 5,191.80
  4. Step 4: Simplify right side
    20,774.16x = 161,783,341.18
  5. Step 5: Solve for x
    x = 161,783,341.18/20,774.16
  6. Step 6: Final answer
    x = 7,787.72

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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.