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Finding the Fourth Proportional to 20,676.48, 31,019.01 and 10,813.08

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Solution

The fourth proportional to 20,676.48, 31,019.01 and 10,813.08 is: 16,221.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,676.48 : 31,019.01 = 10,813.08 : x
  2. Step 2: Convert to fraction form
    20,676.48/31,019.01 = 10,813.08/x
  3. Step 3: Cross multiply
    20,676.48x = 31,019.01 × 10,813.08
  4. Step 4: Simplify right side
    20,676.48x = 335,411,036.65
  5. Step 5: Solve for x
    x = 335,411,036.65/20,676.48
  6. Step 6: Final answer
    x = 16,221.86

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1.5x scale

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.