Home / 8,119.09-12,156.53-4,215.29

Finding the Fourth Proportional to 8,119.09, 12,156.53 and 4,215.29

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Solution

The fourth proportional to 8,119.09, 12,156.53 and 4,215.29 is: 6,311.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,119.09 : 12,156.53 = 4,215.29 : x
  2. Step 2: Convert to fraction form
    8,119.09/12,156.53 = 4,215.29/x
  3. Step 3: Cross multiply
    8,119.09x = 12,156.53 × 4,215.29
  4. Step 4: Simplify right side
    8,119.09x = 51,243,309.58
  5. Step 5: Solve for x
    x = 51,243,309.58/8,119.09
  6. Step 6: Final answer
    x = 6,311.46

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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.