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Finding the Fourth Proportional to 12,378.63, 18,568.80 and 4,983.15

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Solution

The fourth proportional to 12,378.63, 18,568.80 and 4,983.15 is: 7,475.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,378.63 : 18,568.80 = 4,983.15 : x
  2. Step 2: Convert to fraction form
    12,378.63/18,568.80 = 4,983.15/x
  3. Step 3: Cross multiply
    12,378.63x = 18,568.80 × 4,983.15
  4. Step 4: Simplify right side
    12,378.63x = 92,531,115.72
  5. Step 5: Solve for x
    x = 92,531,115.72/12,378.63
  6. Step 6: Final answer
    x = 7,475.07

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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.