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Finding the Fourth Proportional to 8,893.80, 12,278.64 and 7,909.56

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Solution

The fourth proportional to 8,893.80, 12,278.64 and 7,909.56 is: 10,919.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,893.80 : 12,278.64 = 7,909.56 : x
  2. Step 2: Convert to fraction form
    8,893.80/12,278.64 = 7,909.56/x
  3. Step 3: Cross multiply
    8,893.80x = 12,278.64 × 7,909.56
  4. Step 4: Simplify right side
    8,893.80x = 97,118,639.80
  5. Step 5: Solve for x
    x = 97,118,639.80/8,893.80
  6. Step 6: Final answer
    x = 10,919.81

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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.