Home / 12,138.48-16,750.55-6,761.21

Finding the Fourth Proportional to 12,138.48, 16,750.55 and 6,761.21

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Solution

The fourth proportional to 12,138.48, 16,750.55 and 6,761.21 is: 9,330.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.48 : 16,750.55 = 6,761.21 : x
  2. Step 2: Convert to fraction form
    12,138.48/16,750.55 = 6,761.21/x
  3. Step 3: Cross multiply
    12,138.48x = 16,750.55 × 6,761.21
  4. Step 4: Simplify right side
    12,138.48x = 113,253,919.32
  5. Step 5: Solve for x
    x = 113,253,919.32/12,138.48
  6. Step 6: Final answer
    x = 9,330.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.