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Finding the Fourth Proportional to 12,585.62, 18,866.64 and 4,259.81

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Solution

The fourth proportional to 12,585.62, 18,866.64 and 4,259.81 is: 6,385.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,585.62 : 18,866.64 = 4,259.81 : x
  2. Step 2: Convert to fraction form
    12,585.62/18,866.64 = 4,259.81/x
  3. Step 3: Cross multiply
    12,585.62x = 18,866.64 × 4,259.81
  4. Step 4: Simplify right side
    12,585.62x = 80,368,348.91
  5. Step 5: Solve for x
    x = 80,368,348.91/12,585.62
  6. Step 6: Final answer
    x = 6,385.73

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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.