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Finding the Fourth Proportional to 8,690.60, 13,032.70 and 2,847.40

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Solution

The fourth proportional to 8,690.60, 13,032.70 and 2,847.40 is: 4,270.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,690.60 : 13,032.70 = 2,847.40 : x
  2. Step 2: Convert to fraction form
    8,690.60/13,032.70 = 2,847.40/x
  3. Step 3: Cross multiply
    8,690.60x = 13,032.70 × 2,847.40
  4. Step 4: Simplify right side
    8,690.60x = 37,109,309.98
  5. Step 5: Solve for x
    x = 37,109,309.98/8,690.60
  6. Step 6: Final answer
    x = 4,270.05

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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.