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Finding the Fourth Proportional to 12,355.80, 18,541.80 and 7,090.80

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Solution

The fourth proportional to 12,355.80, 18,541.80 and 7,090.80 is: 10,640.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,355.80 : 18,541.80 = 7,090.80 : x
  2. Step 2: Convert to fraction form
    12,355.80/18,541.80 = 7,090.80/x
  3. Step 3: Cross multiply
    12,355.80x = 18,541.80 × 7,090.80
  4. Step 4: Simplify right side
    12,355.80x = 131,476,195.44
  5. Step 5: Solve for x
    x = 131,476,195.44/12,355.80
  6. Step 6: Final answer
    x = 10,640.85

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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.