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Finding the Fourth Proportional to 20,590.99, 30,920.66 and 12,849.01

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Solution

The fourth proportional to 20,590.99, 30,920.66 and 12,849.01 is: 19,294.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,590.99 : 30,920.66 = 12,849.01 : x
  2. Step 2: Convert to fraction form
    20,590.99/30,920.66 = 12,849.01/x
  3. Step 3: Cross multiply
    20,590.99x = 30,920.66 × 12,849.01
  4. Step 4: Simplify right side
    20,590.99x = 397,299,805.30
  5. Step 5: Solve for x
    x = 397,299,805.30/20,590.99
  6. Step 6: Final answer
    x = 19,294.84

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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.