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Finding the Fourth Proportional to 8,920.36, 13,316.90 and 8,327.44

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Solution

The fourth proportional to 8,920.36, 13,316.90 and 8,327.44 is: 12,431.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,920.36 : 13,316.90 = 8,327.44 : x
  2. Step 2: Convert to fraction form
    8,920.36/13,316.90 = 8,327.44/x
  3. Step 3: Cross multiply
    8,920.36x = 13,316.90 × 8,327.44
  4. Step 4: Simplify right side
    8,920.36x = 110,895,685.74
  5. Step 5: Solve for x
    x = 110,895,685.74/8,920.36
  6. Step 6: Final answer
    x = 12,431.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.