Home / 20,756.91-31,144.50-10,893.90

Finding the Fourth Proportional to 20,756.91, 31,144.50 and 10,893.90

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Solution

The fourth proportional to 20,756.91, 31,144.50 and 10,893.90 is: 16,345.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,756.91 : 31,144.50 = 10,893.90 : x
  2. Step 2: Convert to fraction form
    20,756.91/31,144.50 = 10,893.90/x
  3. Step 3: Cross multiply
    20,756.91x = 31,144.50 × 10,893.90
  4. Step 4: Simplify right side
    20,756.91x = 339,285,068.55
  5. Step 5: Solve for x
    x = 339,285,068.55/20,756.91
  6. Step 6: Final answer
    x = 16,345.64

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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.