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Finding the Fourth Proportional to 8,977.15, 12,361.41 and 8,451.12

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Solution

The fourth proportional to 8,977.15, 12,361.41 and 8,451.12 is: 11,637.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,977.15 : 12,361.41 = 8,451.12 : x
  2. Step 2: Convert to fraction form
    8,977.15/12,361.41 = 8,451.12/x
  3. Step 3: Cross multiply
    8,977.15x = 12,361.41 × 8,451.12
  4. Step 4: Simplify right side
    8,977.15x = 104,467,717.02
  5. Step 5: Solve for x
    x = 104,467,717.02/8,977.15
  6. Step 6: Final answer
    x = 11,637.08

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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.