Home / 12,058.45-18,081.60-7,129.60

Finding the Fourth Proportional to 12,058.45, 18,081.60 and 7,129.60

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Solution

The fourth proportional to 12,058.45, 18,081.60 and 7,129.60 is: 10,690.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,058.45 : 18,081.60 = 7,129.60 : x
  2. Step 2: Convert to fraction form
    12,058.45/18,081.60 = 7,129.60/x
  3. Step 3: Cross multiply
    12,058.45x = 18,081.60 × 7,129.60
  4. Step 4: Simplify right side
    12,058.45x = 128,914,575.36
  5. Step 5: Solve for x
    x = 128,914,575.36/12,058.45
  6. Step 6: Final answer
    x = 10,690.81

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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.