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Finding the Fourth Proportional to 10,418.77, 15,609.91 and 8,674.98

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Solution

The fourth proportional to 10,418.77, 15,609.91 and 8,674.98 is: 12,997.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,418.77 : 15,609.91 = 8,674.98 : x
  2. Step 2: Convert to fraction form
    10,418.77/15,609.91 = 8,674.98/x
  3. Step 3: Cross multiply
    10,418.77x = 15,609.91 × 8,674.98
  4. Step 4: Simplify right side
    10,418.77x = 135,415,657.05
  5. Step 5: Solve for x
    x = 135,415,657.05/10,418.77
  6. Step 6: Final answer
    x = 12,997.28

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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.