Home / 7,840.72-11,761.08-3,458.20

Finding the Fourth Proportional to 7,840.72, 11,761.08 and 3,458.20

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Solution

The fourth proportional to 7,840.72, 11,761.08 and 3,458.20 is: 5,187.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,840.72 : 11,761.08 = 3,458.20 : x
  2. Step 2: Convert to fraction form
    7,840.72/11,761.08 = 3,458.20/x
  3. Step 3: Cross multiply
    7,840.72x = 11,761.08 × 3,458.20
  4. Step 4: Simplify right side
    7,840.72x = 40,672,166.86
  5. Step 5: Solve for x
    x = 40,672,166.86/7,840.72
  6. Step 6: Final answer
    x = 5,187.30

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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.