Home / 11,837.20-17,739.60-7,877.20

Finding the Fourth Proportional to 11,837.20, 17,739.60 and 7,877.20

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Solution

The fourth proportional to 11,837.20, 17,739.60 and 7,877.20 is: 11,805.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,837.20 : 17,739.60 = 7,877.20 : x
  2. Step 2: Convert to fraction form
    11,837.20/17,739.60 = 7,877.20/x
  3. Step 3: Cross multiply
    11,837.20x = 17,739.60 × 7,877.20
  4. Step 4: Simplify right side
    11,837.20x = 139,738,377.12
  5. Step 5: Solve for x
    x = 139,738,377.12/11,837.20
  6. Step 6: Final answer
    x = 11,805.02

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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.