Home / 5,237.72-7,851.90-2,115.80

Finding the Fourth Proportional to 5,237.72, 7,851.90 and 2,115.80

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Solution

The fourth proportional to 5,237.72, 7,851.90 and 2,115.80 is: 3,171.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,237.72 : 7,851.90 = 2,115.80 : x
  2. Step 2: Convert to fraction form
    5,237.72/7,851.90 = 2,115.80/x
  3. Step 3: Cross multiply
    5,237.72x = 7,851.90 × 2,115.80
  4. Step 4: Simplify right side
    5,237.72x = 16,613,050.02
  5. Step 5: Solve for x
    x = 16,613,050.02/5,237.72
  6. Step 6: Final answer
    x = 3,171.81

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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.