Home / 20,809.10-31,196.10-9,709.94

Finding the Fourth Proportional to 20,809.10, 31,196.10 and 9,709.94

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Solution

The fourth proportional to 20,809.10, 31,196.10 and 9,709.94 is: 14,556.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.10 : 31,196.10 = 9,709.94 : x
  2. Step 2: Convert to fraction form
    20,809.10/31,196.10 = 9,709.94/x
  3. Step 3: Cross multiply
    20,809.10x = 31,196.10 × 9,709.94
  4. Step 4: Simplify right side
    20,809.10x = 302,912,259.23
  5. Step 5: Solve for x
    x = 302,912,259.23/20,809.10
  6. Step 6: Final answer
    x = 14,556.72

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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.