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Finding the Fourth Proportional to 12,653.79, 18,992.20 and 6,735.65

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Solution

The fourth proportional to 12,653.79, 18,992.20 and 6,735.65 is: 10,109.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,653.79 : 18,992.20 = 6,735.65 : x
  2. Step 2: Convert to fraction form
    12,653.79/18,992.20 = 6,735.65/x
  3. Step 3: Cross multiply
    12,653.79x = 18,992.20 × 6,735.65
  4. Step 4: Simplify right side
    12,653.79x = 127,924,811.93
  5. Step 5: Solve for x
    x = 127,924,811.93/12,653.79
  6. Step 6: Final answer
    x = 10,109.60

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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.