Home / 12,659.12-18,988.72-3,425.12

Finding the Fourth Proportional to 12,659.12, 18,988.72 and 3,425.12

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Solution

The fourth proportional to 12,659.12, 18,988.72 and 3,425.12 is: 5,137.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,659.12 : 18,988.72 = 3,425.12 : x
  2. Step 2: Convert to fraction form
    12,659.12/18,988.72 = 3,425.12/x
  3. Step 3: Cross multiply
    12,659.12x = 18,988.72 × 3,425.12
  4. Step 4: Simplify right side
    12,659.12x = 65,038,644.65
  5. Step 5: Solve for x
    x = 65,038,644.65/12,659.12
  6. Step 6: Final answer
    x = 5,137.69

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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.