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Finding the Fourth Proportional to 8,579.40, 12,875.94 and 7,361.16

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Solution

The fourth proportional to 8,579.40, 12,875.94 and 7,361.16 is: 11,047.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,579.40 : 12,875.94 = 7,361.16 : x
  2. Step 2: Convert to fraction form
    8,579.40/12,875.94 = 7,361.16/x
  3. Step 3: Cross multiply
    8,579.40x = 12,875.94 × 7,361.16
  4. Step 4: Simplify right side
    8,579.40x = 94,781,854.49
  5. Step 5: Solve for x
    x = 94,781,854.49/8,579.40
  6. Step 6: Final answer
    x = 11,047.61

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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.