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Finding the Fourth Proportional to 7,314.60, 10,947.60 and 6,439.80

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Solution

The fourth proportional to 7,314.60, 10,947.60 and 6,439.80 is: 9,638.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,314.60 : 10,947.60 = 6,439.80 : x
  2. Step 2: Convert to fraction form
    7,314.60/10,947.60 = 6,439.80/x
  3. Step 3: Cross multiply
    7,314.60x = 10,947.60 × 6,439.80
  4. Step 4: Simplify right side
    7,314.60x = 70,500,354.48
  5. Step 5: Solve for x
    x = 70,500,354.48/7,314.60
  6. Step 6: Final answer
    x = 9,638.31

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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.