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Finding the Fourth Proportional to 7,911.44, 11,847.72 and 6,340.40

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Solution

The fourth proportional to 7,911.44, 11,847.72 and 6,340.40 is: 9,495.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.44 : 11,847.72 = 6,340.40 : x
  2. Step 2: Convert to fraction form
    7,911.44/11,847.72 = 6,340.40/x
  3. Step 3: Cross multiply
    7,911.44x = 11,847.72 × 6,340.40
  4. Step 4: Simplify right side
    7,911.44x = 75,119,283.89
  5. Step 5: Solve for x
    x = 75,119,283.89/7,911.44
  6. Step 6: Final answer
    x = 9,495.02

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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.