Home / 8,118.72-12,180.36-3,120.48

Finding the Fourth Proportional to 8,118.72, 12,180.36 and 3,120.48

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Solution

The fourth proportional to 8,118.72, 12,180.36 and 3,120.48 is: 4,681.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,118.72 : 12,180.36 = 3,120.48 : x
  2. Step 2: Convert to fraction form
    8,118.72/12,180.36 = 3,120.48/x
  3. Step 3: Cross multiply
    8,118.72x = 12,180.36 × 3,120.48
  4. Step 4: Simplify right side
    8,118.72x = 38,008,569.77
  5. Step 5: Solve for x
    x = 38,008,569.77/8,118.72
  6. Step 6: Final answer
    x = 4,681.60

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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.