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Finding the Fourth Proportional to 12,640.60, 18,961.86 and 9,683.32

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Solution

The fourth proportional to 12,640.60, 18,961.86 and 9,683.32 is: 14,525.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.60 : 18,961.86 = 9,683.32 : x
  2. Step 2: Convert to fraction form
    12,640.60/18,961.86 = 9,683.32/x
  3. Step 3: Cross multiply
    12,640.60x = 18,961.86 × 9,683.32
  4. Step 4: Simplify right side
    12,640.60x = 183,613,758.18
  5. Step 5: Solve for x
    x = 183,613,758.18/12,640.60
  6. Step 6: Final answer
    x = 14,525.72

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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.