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Finding the Fourth Proportional to 28,243.49, 38,974.47 and 16,143.50

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Solution

The fourth proportional to 28,243.49, 38,974.47 and 16,143.50 is: 22,277.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,243.49 : 38,974.47 = 16,143.50 : x
  2. Step 2: Convert to fraction form
    28,243.49/38,974.47 = 16,143.50/x
  3. Step 3: Cross multiply
    28,243.49x = 38,974.47 × 16,143.50
  4. Step 4: Simplify right side
    28,243.49x = 629,184,393.34
  5. Step 5: Solve for x
    x = 629,184,393.34/28,243.49
  6. Step 6: Final answer
    x = 22,277.15

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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.