Home / 20,991.56-31,468.50-19,165.41

Finding the Fourth Proportional to 20,991.56, 31,468.50 and 19,165.41

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Solution

The fourth proportional to 20,991.56, 31,468.50 and 19,165.41 is: 28,730.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,991.56 : 31,468.50 = 19,165.41 : x
  2. Step 2: Convert to fraction form
    20,991.56/31,468.50 = 19,165.41/x
  3. Step 3: Cross multiply
    20,991.56x = 31,468.50 × 19,165.41
  4. Step 4: Simplify right side
    20,991.56x = 603,106,704.59
  5. Step 5: Solve for x
    x = 603,106,704.59/20,991.56
  6. Step 6: Final answer
    x = 28,730.92

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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.