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Finding the Fourth Proportional to 11,978.91, 16,530.90 and 6,674.07

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Solution

The fourth proportional to 11,978.91, 16,530.90 and 6,674.07 is: 9,210.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,978.91 : 16,530.90 = 6,674.07 : x
  2. Step 2: Convert to fraction form
    11,978.91/16,530.90 = 6,674.07/x
  3. Step 3: Cross multiply
    11,978.91x = 16,530.90 × 6,674.07
  4. Step 4: Simplify right side
    11,978.91x = 110,328,383.76
  5. Step 5: Solve for x
    x = 110,328,383.76/11,978.91
  6. Step 6: Final answer
    x = 9,210.22

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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.