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Finding the Fourth Proportional to 12,992.86, 19,489.25 and 4,672.86

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Solution

The fourth proportional to 12,992.86, 19,489.25 and 4,672.86 is: 7,009.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,992.86 : 19,489.25 = 4,672.86 : x
  2. Step 2: Convert to fraction form
    12,992.86/19,489.25 = 4,672.86/x
  3. Step 3: Cross multiply
    12,992.86x = 19,489.25 × 4,672.86
  4. Step 4: Simplify right side
    12,992.86x = 91,070,545.27
  5. Step 5: Solve for x
    x = 91,070,545.27/12,992.86
  6. Step 6: Final answer
    x = 7,009.28

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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.