Home / 13,977.86-20,966.10-5,212.09

Finding the Fourth Proportional to 13,977.86, 20,966.10 and 5,212.09

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Solution

The fourth proportional to 13,977.86, 20,966.10 and 5,212.09 is: 7,817.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,977.86 : 20,966.10 = 5,212.09 : x
  2. Step 2: Convert to fraction form
    13,977.86/20,966.10 = 5,212.09/x
  3. Step 3: Cross multiply
    13,977.86x = 20,966.10 × 5,212.09
  4. Step 4: Simplify right side
    13,977.86x = 109,277,095.32
  5. Step 5: Solve for x
    x = 109,277,095.32/13,977.86
  6. Step 6: Final answer
    x = 7,817.87

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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.