Home / 20,739.57-31,105.08-5,945.20

Finding the Fourth Proportional to 20,739.57, 31,105.08 and 5,945.20

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Solution

The fourth proportional to 20,739.57, 31,105.08 and 5,945.20 is: 8,916.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,739.57 : 31,105.08 = 5,945.20 : x
  2. Step 2: Convert to fraction form
    20,739.57/31,105.08 = 5,945.20/x
  3. Step 3: Cross multiply
    20,739.57x = 31,105.08 × 5,945.20
  4. Step 4: Simplify right side
    20,739.57x = 184,925,921.62
  5. Step 5: Solve for x
    x = 184,925,921.62/20,739.57
  6. Step 6: Final answer
    x = 8,916.57

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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.