Home / 8,161.28-12,239.36-2,688

Finding the Fourth Proportional to 8,161.28, 12,239.36 and 2,688

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Solution

The fourth proportional to 8,161.28, 12,239.36 and 2,688 is: 4,031.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,161.28 : 12,239.36 = 2,688 : x
  2. Step 2: Convert to fraction form
    8,161.28/12,239.36 = 2,688/x
  3. Step 3: Cross multiply
    8,161.28x = 12,239.36 × 2,688
  4. Step 4: Simplify right side
    8,161.28x = 32,899,399.68
  5. Step 5: Solve for x
    x = 32,899,399.68/8,161.28
  6. Step 6: Final answer
    x = 4,031.16

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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.