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Finding the Fourth Proportional to 12,011.56, 16,575.94 and 6,978.68

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Solution

The fourth proportional to 12,011.56, 16,575.94 and 6,978.68 is: 9,630.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,011.56 : 16,575.94 = 6,978.68 : x
  2. Step 2: Convert to fraction form
    12,011.56/16,575.94 = 6,978.68/x
  3. Step 3: Cross multiply
    12,011.56x = 16,575.94 × 6,978.68
  4. Step 4: Simplify right side
    12,011.56x = 115,678,180.96
  5. Step 5: Solve for x
    x = 115,678,180.96/12,011.56
  6. Step 6: Final answer
    x = 9,630.57

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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.