Home / 8,709.84-12,015.18-5,517.90

Finding the Fourth Proportional to 8,709.84, 12,015.18 and 5,517.90

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Solution

The fourth proportional to 8,709.84, 12,015.18 and 5,517.90 is: 7,611.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,709.84 : 12,015.18 = 5,517.90 : x
  2. Step 2: Convert to fraction form
    8,709.84/12,015.18 = 5,517.90/x
  3. Step 3: Cross multiply
    8,709.84x = 12,015.18 × 5,517.90
  4. Step 4: Simplify right side
    8,709.84x = 66,298,561.72
  5. Step 5: Solve for x
    x = 66,298,561.72/8,709.84
  6. Step 6: Final answer
    x = 7,611.91

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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.