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Finding the Fourth Proportional to 12,216.78, 16,859.16 and 6,627.78

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Solution

The fourth proportional to 12,216.78, 16,859.16 and 6,627.78 is: 9,146.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,216.78 : 16,859.16 = 6,627.78 : x
  2. Step 2: Convert to fraction form
    12,216.78/16,859.16 = 6,627.78/x
  3. Step 3: Cross multiply
    12,216.78x = 16,859.16 × 6,627.78
  4. Step 4: Simplify right side
    12,216.78x = 111,738,803.46
  5. Step 5: Solve for x
    x = 111,738,803.46/12,216.78
  6. Step 6: Final answer
    x = 9,146.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.