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Finding the Fourth Proportional to 12,090.90, 18,139.41 and 5,853.90

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Solution

The fourth proportional to 12,090.90, 18,139.41 and 5,853.90 is: 8,782.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,090.90 : 18,139.41 = 5,853.90 : x
  2. Step 2: Convert to fraction form
    12,090.90/18,139.41 = 5,853.90/x
  3. Step 3: Cross multiply
    12,090.90x = 18,139.41 × 5,853.90
  4. Step 4: Simplify right side
    12,090.90x = 106,186,292.20
  5. Step 5: Solve for x
    x = 106,186,292.20/12,090.90
  6. Step 6: Final answer
    x = 8,782.33

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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.