Home / 12,099.78-18,031.01-11,997.72

Finding the Fourth Proportional to 12,099.78, 18,031.01 and 11,997.72

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Solution

The fourth proportional to 12,099.78, 18,031.01 and 11,997.72 is: 17,878.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,099.78 : 18,031.01 = 11,997.72 : x
  2. Step 2: Convert to fraction form
    12,099.78/18,031.01 = 11,997.72/x
  3. Step 3: Cross multiply
    12,099.78x = 18,031.01 × 11,997.72
  4. Step 4: Simplify right side
    12,099.78x = 216,330,949.31
  5. Step 5: Solve for x
    x = 216,330,949.31/12,099.78
  6. Step 6: Final answer
    x = 17,878.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.