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Finding the Fourth Proportional to 28,133.63, 38,784.33 and 19,169.63

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Solution

The fourth proportional to 28,133.63, 38,784.33 and 19,169.63 is: 26,426.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,133.63 : 38,784.33 = 19,169.63 : x
  2. Step 2: Convert to fraction form
    28,133.63/38,784.33 = 19,169.63/x
  3. Step 3: Cross multiply
    28,133.63x = 38,784.33 × 19,169.63
  4. Step 4: Simplify right side
    28,133.63x = 743,481,061.98
  5. Step 5: Solve for x
    x = 743,481,061.98/28,133.63
  6. Step 6: Final answer
    x = 26,426.78

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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.