Home / 20,968.74-28,936.85-12,015.81

Finding the Fourth Proportional to 20,968.74, 28,936.85 and 12,015.81

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Solution

The fourth proportional to 20,968.74, 28,936.85 and 12,015.81 is: 16,581.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.74 : 28,936.85 = 12,015.81 : x
  2. Step 2: Convert to fraction form
    20,968.74/28,936.85 = 12,015.81/x
  3. Step 3: Cross multiply
    20,968.74x = 28,936.85 × 12,015.81
  4. Step 4: Simplify right side
    20,968.74x = 347,699,631.52
  5. Step 5: Solve for x
    x = 347,699,631.52/20,968.74
  6. Step 6: Final answer
    x = 16,581.81

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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.