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Finding the Fourth Proportional to 7,989.01, 11,984.73 and 4,871.32

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Solution

The fourth proportional to 7,989.01, 11,984.73 and 4,871.32 is: 7,307.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,989.01 : 11,984.73 = 4,871.32 : x
  2. Step 2: Convert to fraction form
    7,989.01/11,984.73 = 4,871.32/x
  3. Step 3: Cross multiply
    7,989.01x = 11,984.73 × 4,871.32
  4. Step 4: Simplify right side
    7,989.01x = 58,381,454.94
  5. Step 5: Solve for x
    x = 58,381,454.94/7,989.01
  6. Step 6: Final answer
    x = 7,307.72

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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.