Home / 20,912.96-31,369.26-5,118.04

Finding the Fourth Proportional to 20,912.96, 31,369.26 and 5,118.04

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Solution

The fourth proportional to 20,912.96, 31,369.26 and 5,118.04 is: 7,677.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.96 : 31,369.26 = 5,118.04 : x
  2. Step 2: Convert to fraction form
    20,912.96/31,369.26 = 5,118.04/x
  3. Step 3: Cross multiply
    20,912.96x = 31,369.26 × 5,118.04
  4. Step 4: Simplify right side
    20,912.96x = 160,549,127.45
  5. Step 5: Solve for x
    x = 160,549,127.45/20,912.96
  6. Step 6: Final answer
    x = 7,677.02

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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.