Home / 12,126.72-18,197.85-7,975.08

Finding the Fourth Proportional to 12,126.72, 18,197.85 and 7,975.08

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Solution

The fourth proportional to 12,126.72, 18,197.85 and 7,975.08 is: 11,967.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,126.72 : 18,197.85 = 7,975.08 : x
  2. Step 2: Convert to fraction form
    12,126.72/18,197.85 = 7,975.08/x
  3. Step 3: Cross multiply
    12,126.72x = 18,197.85 × 7,975.08
  4. Step 4: Simplify right side
    12,126.72x = 145,129,309.58
  5. Step 5: Solve for x
    x = 145,129,309.58/12,126.72
  6. Step 6: Final answer
    x = 11,967.73

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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.