Home / 8,639.11-12,955.90-3,705.60

Finding the Fourth Proportional to 8,639.11, 12,955.90 and 3,705.60

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Solution

The fourth proportional to 8,639.11, 12,955.90 and 3,705.60 is: 5,557.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,639.11 : 12,955.90 = 3,705.60 : x
  2. Step 2: Convert to fraction form
    8,639.11/12,955.90 = 3,705.60/x
  3. Step 3: Cross multiply
    8,639.11x = 12,955.90 × 3,705.60
  4. Step 4: Simplify right side
    8,639.11x = 48,009,383.04
  5. Step 5: Solve for x
    x = 48,009,383.04/8,639.11
  6. Step 6: Final answer
    x = 5,557.21

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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.