Home / 12,945.15-19,388.97-12,630.87

Finding the Fourth Proportional to 12,945.15, 19,388.97 and 12,630.87

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Solution

The fourth proportional to 12,945.15, 19,388.97 and 12,630.87 is: 18,918.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,945.15 : 19,388.97 = 12,630.87 : x
  2. Step 2: Convert to fraction form
    12,945.15/19,388.97 = 12,630.87/x
  3. Step 3: Cross multiply
    12,945.15x = 19,388.97 × 12,630.87
  4. Step 4: Simplify right side
    12,945.15x = 244,899,559.50
  5. Step 5: Solve for x
    x = 244,899,559.50/12,945.15
  6. Step 6: Final answer
    x = 18,918.25

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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.