Home / 20,923.92-28,875.42-11,493

Finding the Fourth Proportional to 20,923.92, 28,875.42 and 11,493

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Solution

The fourth proportional to 20,923.92, 28,875.42 and 11,493 is: 15,860.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,923.92 : 28,875.42 = 11,493 : x
  2. Step 2: Convert to fraction form
    20,923.92/28,875.42 = 11,493/x
  3. Step 3: Cross multiply
    20,923.92x = 28,875.42 × 11,493
  4. Step 4: Simplify right side
    20,923.92x = 331,865,202.06
  5. Step 5: Solve for x
    x = 331,865,202.06/20,923.92
  6. Step 6: Final answer
    x = 15,860.57

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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.