Home / 8,118.20-12,156.37-6,955.72

Finding the Fourth Proportional to 8,118.20, 12,156.37 and 6,955.72

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Solution

The fourth proportional to 8,118.20, 12,156.37 and 6,955.72 is: 10,415.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,118.20 : 12,156.37 = 6,955.72 : x
  2. Step 2: Convert to fraction form
    8,118.20/12,156.37 = 6,955.72/x
  3. Step 3: Cross multiply
    8,118.20x = 12,156.37 × 6,955.72
  4. Step 4: Simplify right side
    8,118.20x = 84,556,305.94
  5. Step 5: Solve for x
    x = 84,556,305.94/8,118.20
  6. Step 6: Final answer
    x = 10,415.65

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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.