Home / 5,415.76-8,118.48-2,127.76

Finding the Fourth Proportional to 5,415.76, 8,118.48 and 2,127.76

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Solution

The fourth proportional to 5,415.76, 8,118.48 and 2,127.76 is: 3,189.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,415.76 : 8,118.48 = 2,127.76 : x
  2. Step 2: Convert to fraction form
    5,415.76/8,118.48 = 2,127.76/x
  3. Step 3: Cross multiply
    5,415.76x = 8,118.48 × 2,127.76
  4. Step 4: Simplify right side
    5,415.76x = 17,274,177.00
  5. Step 5: Solve for x
    x = 17,274,177.00/5,415.76
  6. Step 6: Final answer
    x = 3,189.61

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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.