Home / 20,513.99-30,757.84-8,664.55

Finding the Fourth Proportional to 20,513.99, 30,757.84 and 8,664.55

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Solution

The fourth proportional to 20,513.99, 30,757.84 and 8,664.55 is: 12,991.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,513.99 : 30,757.84 = 8,664.55 : x
  2. Step 2: Convert to fraction form
    20,513.99/30,757.84 = 8,664.55/x
  3. Step 3: Cross multiply
    20,513.99x = 30,757.84 × 8,664.55
  4. Step 4: Simplify right side
    20,513.99x = 266,502,842.57
  5. Step 5: Solve for x
    x = 266,502,842.57/20,513.99
  6. Step 6: Final answer
    x = 12,991.27

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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.