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Finding the Fourth Proportional to 7,899.86, 11,847.06 and 4,395.20

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Solution

The fourth proportional to 7,899.86, 11,847.06 and 4,395.20 is: 6,591.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,899.86 : 11,847.06 = 4,395.20 : x
  2. Step 2: Convert to fraction form
    7,899.86/11,847.06 = 4,395.20/x
  3. Step 3: Cross multiply
    7,899.86x = 11,847.06 × 4,395.20
  4. Step 4: Simplify right side
    7,899.86x = 52,070,116.90
  5. Step 5: Solve for x
    x = 52,070,116.90/7,899.86
  6. Step 6: Final answer
    x = 6,591.27

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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.