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Finding the Fourth Proportional to 28,870.80, 43,306.20 and 19,021.20

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Solution

The fourth proportional to 28,870.80, 43,306.20 and 19,021.20 is: 28,531.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,870.80 : 43,306.20 = 19,021.20 : x
  2. Step 2: Convert to fraction form
    28,870.80/43,306.20 = 19,021.20/x
  3. Step 3: Cross multiply
    28,870.80x = 43,306.20 × 19,021.20
  4. Step 4: Simplify right side
    28,870.80x = 823,735,891.44
  5. Step 5: Solve for x
    x = 823,735,891.44/28,870.80
  6. Step 6: Final answer
    x = 28,531.80

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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.