Home / 12,380.48-18,555.05-7,180.28

Finding the Fourth Proportional to 12,380.48, 18,555.05 and 7,180.28

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Solution

The fourth proportional to 12,380.48, 18,555.05 and 7,180.28 is: 10,761.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,380.48 : 18,555.05 = 7,180.28 : x
  2. Step 2: Convert to fraction form
    12,380.48/18,555.05 = 7,180.28/x
  3. Step 3: Cross multiply
    12,380.48x = 18,555.05 × 7,180.28
  4. Step 4: Simplify right side
    12,380.48x = 133,230,325.74
  5. Step 5: Solve for x
    x = 133,230,325.74/12,380.48
  6. Step 6: Final answer
    x = 10,761.33

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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.