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Finding the Fourth Proportional to 7,862.80, 11,783.40 and 5,551.60

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Solution

The fourth proportional to 7,862.80, 11,783.40 and 5,551.60 is: 8,319.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,862.80 : 11,783.40 = 5,551.60 : x
  2. Step 2: Convert to fraction form
    7,862.80/11,783.40 = 5,551.60/x
  3. Step 3: Cross multiply
    7,862.80x = 11,783.40 × 5,551.60
  4. Step 4: Simplify right side
    7,862.80x = 65,416,723.44
  5. Step 5: Solve for x
    x = 65,416,723.44/7,862.80
  6. Step 6: Final answer
    x = 8,319.77

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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.