Home / 8,108.79-12,168.30-3,178.29

Finding the Fourth Proportional to 8,108.79, 12,168.30 and 3,178.29

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Solution

The fourth proportional to 8,108.79, 12,168.30 and 3,178.29 is: 4,769.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,108.79 : 12,168.30 = 3,178.29 : x
  2. Step 2: Convert to fraction form
    8,108.79/12,168.30 = 3,178.29/x
  3. Step 3: Cross multiply
    8,108.79x = 12,168.30 × 3,178.29
  4. Step 4: Simplify right side
    8,108.79x = 38,674,386.21
  5. Step 5: Solve for x
    x = 38,674,386.21/8,108.79
  6. Step 6: Final answer
    x = 4,769.44

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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.