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Finding the Fourth Proportional to 8,455.60, 12,682.60 and 2,908.40

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Solution

The fourth proportional to 8,455.60, 12,682.60 and 2,908.40 is: 4,362.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,455.60 : 12,682.60 = 2,908.40 : x
  2. Step 2: Convert to fraction form
    8,455.60/12,682.60 = 2,908.40/x
  3. Step 3: Cross multiply
    8,455.60x = 12,682.60 × 2,908.40
  4. Step 4: Simplify right side
    8,455.60x = 36,886,073.84
  5. Step 5: Solve for x
    x = 36,886,073.84/8,455.60
  6. Step 6: Final answer
    x = 4,362.32

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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.