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Finding the Fourth Proportional to 7,984.58, 11,990.21 and 4,989.59

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Solution

The fourth proportional to 7,984.58, 11,990.21 and 4,989.59 is: 7,492.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,984.58 : 11,990.21 = 4,989.59 : x
  2. Step 2: Convert to fraction form
    7,984.58/11,990.21 = 4,989.59/x
  3. Step 3: Cross multiply
    7,984.58x = 11,990.21 × 4,989.59
  4. Step 4: Simplify right side
    7,984.58x = 59,826,231.91
  5. Step 5: Solve for x
    x = 59,826,231.91/7,984.58
  6. Step 6: Final answer
    x = 7,492.72

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1.5x scale

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.