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Finding the Fourth Proportional to 11,905.26, 17,860.86 and 8,402.10

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Solution

The fourth proportional to 11,905.26, 17,860.86 and 8,402.10 is: 12,605.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,905.26 : 17,860.86 = 8,402.10 : x
  2. Step 2: Convert to fraction form
    11,905.26/17,860.86 = 8,402.10/x
  3. Step 3: Cross multiply
    11,905.26x = 17,860.86 × 8,402.10
  4. Step 4: Simplify right side
    11,905.26x = 150,068,710.80
  5. Step 5: Solve for x
    x = 150,068,710.80/11,905.26
  6. Step 6: Final answer
    x = 12,605.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.