Home / 20,907.45-28,861.38-13,363.65

Finding the Fourth Proportional to 20,907.45, 28,861.38 and 13,363.65

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Solution

The fourth proportional to 20,907.45, 28,861.38 and 13,363.65 is: 18,447.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907.45 : 28,861.38 = 13,363.65 : x
  2. Step 2: Convert to fraction form
    20,907.45/28,861.38 = 13,363.65/x
  3. Step 3: Cross multiply
    20,907.45x = 28,861.38 × 13,363.65
  4. Step 4: Simplify right side
    20,907.45x = 385,693,380.84
  5. Step 5: Solve for x
    x = 385,693,380.84/20,907.45
  6. Step 6: Final answer
    x = 18,447.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.