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Finding the Fourth Proportional to 12,165.78, 16,788.78 and 6,576.78

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Solution

The fourth proportional to 12,165.78, 16,788.78 and 6,576.78 is: 9,075.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,165.78 : 16,788.78 = 6,576.78 : x
  2. Step 2: Convert to fraction form
    12,165.78/16,788.78 = 6,576.78/x
  3. Step 3: Cross multiply
    12,165.78x = 16,788.78 × 6,576.78
  4. Step 4: Simplify right side
    12,165.78x = 110,416,112.53
  5. Step 5: Solve for x
    x = 110,416,112.53/12,165.78
  6. Step 6: Final answer
    x = 9,075.96

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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.