Home / 28,243.78-38,975.01-16,143.90

Finding the Fourth Proportional to 28,243.78, 38,975.01 and 16,143.90

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Solution

The fourth proportional to 28,243.78, 38,975.01 and 16,143.90 is: 22,277.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,243.78 : 38,975.01 = 16,143.90 : x
  2. Step 2: Convert to fraction form
    28,243.78/38,975.01 = 16,143.90/x
  3. Step 3: Cross multiply
    28,243.78x = 38,975.01 × 16,143.90
  4. Step 4: Simplify right side
    28,243.78x = 629,208,663.94
  5. Step 5: Solve for x
    x = 629,208,663.94/28,243.78
  6. Step 6: Final answer
    x = 22,277.78

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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.