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Finding the Fourth Proportional to 19,010.80, 28,564.80 and 16,872.40

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Solution

The fourth proportional to 19,010.80, 28,564.80 and 16,872.40 is: 25,351.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,010.80 : 28,564.80 = 16,872.40 : x
  2. Step 2: Convert to fraction form
    19,010.80/28,564.80 = 16,872.40/x
  3. Step 3: Cross multiply
    19,010.80x = 28,564.80 × 16,872.40
  4. Step 4: Simplify right side
    19,010.80x = 481,956,731.52
  5. Step 5: Solve for x
    x = 481,956,731.52/19,010.80
  6. Step 6: Final answer
    x = 25,351.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.