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Finding the Fourth Proportional to 12,659.58, 18,986.70 and 5,813.70

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Solution

The fourth proportional to 12,659.58, 18,986.70 and 5,813.70 is: 8,719.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,659.58 : 18,986.70 = 5,813.70 : x
  2. Step 2: Convert to fraction form
    12,659.58/18,986.70 = 5,813.70/x
  3. Step 3: Cross multiply
    12,659.58x = 18,986.70 × 5,813.70
  4. Step 4: Simplify right side
    12,659.58x = 110,382,977.79
  5. Step 5: Solve for x
    x = 110,382,977.79/12,659.58
  6. Step 6: Final answer
    x = 8,719.32

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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.