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Finding the Fourth Proportional to 12,658.60, 18,986.23 and 3,299.30

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Solution

The fourth proportional to 12,658.60, 18,986.23 and 3,299.30 is: 4,948.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,658.60 : 18,986.23 = 3,299.30 : x
  2. Step 2: Convert to fraction form
    12,658.60/18,986.23 = 3,299.30/x
  3. Step 3: Cross multiply
    12,658.60x = 18,986.23 × 3,299.30
  4. Step 4: Simplify right side
    12,658.60x = 62,641,268.64
  5. Step 5: Solve for x
    x = 62,641,268.64/12,658.60
  6. Step 6: Final answer
    x = 4,948.51

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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.