Home / 20,217.87-27,899.53-11,142.93

Finding the Fourth Proportional to 20,217.87, 27,899.53 and 11,142.93

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Solution

The fourth proportional to 20,217.87, 27,899.53 and 11,142.93 is: 15,376.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,217.87 : 27,899.53 = 11,142.93 : x
  2. Step 2: Convert to fraction form
    20,217.87/27,899.53 = 11,142.93/x
  3. Step 3: Cross multiply
    20,217.87x = 27,899.53 × 11,142.93
  4. Step 4: Simplify right side
    20,217.87x = 310,882,586.59
  5. Step 5: Solve for x
    x = 310,882,586.59/20,217.87
  6. Step 6: Final answer
    x = 15,376.62

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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.