Home / 11,678.21-16,116.38-6,642.90

Finding the Fourth Proportional to 11,678.21, 16,116.38 and 6,642.90

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Solution

The fourth proportional to 11,678.21, 16,116.38 and 6,642.90 is: 9,167.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,678.21 : 16,116.38 = 6,642.90 : x
  2. Step 2: Convert to fraction form
    11,678.21/16,116.38 = 6,642.90/x
  3. Step 3: Cross multiply
    11,678.21x = 16,116.38 × 6,642.90
  4. Step 4: Simplify right side
    11,678.21x = 107,059,500.70
  5. Step 5: Solve for x
    x = 107,059,500.70/11,678.21
  6. Step 6: Final answer
    x = 9,167.46

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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.