Home / 20,911.94-28,856.56-12,412.61

Finding the Fourth Proportional to 20,911.94, 28,856.56 and 12,412.61

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Solution

The fourth proportional to 20,911.94, 28,856.56 and 12,412.61 is: 17,128.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.94 : 28,856.56 = 12,412.61 : x
  2. Step 2: Convert to fraction form
    20,911.94/28,856.56 = 12,412.61/x
  3. Step 3: Cross multiply
    20,911.94x = 28,856.56 × 12,412.61
  4. Step 4: Simplify right side
    20,911.94x = 358,185,297.36
  5. Step 5: Solve for x
    x = 358,185,297.36/20,911.94
  6. Step 6: Final answer
    x = 17,128.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.