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Finding the Fourth Proportional to 28,243.80, 38,980.80 and 16,306.20

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Solution

The fourth proportional to 28,243.80, 38,980.80 and 16,306.20 is: 22,505.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,243.80 : 38,980.80 = 16,306.20 : x
  2. Step 2: Convert to fraction form
    28,243.80/38,980.80 = 16,306.20/x
  3. Step 3: Cross multiply
    28,243.80x = 38,980.80 × 16,306.20
  4. Step 4: Simplify right side
    28,243.80x = 635,628,720.96
  5. Step 5: Solve for x
    x = 635,628,720.96/28,243.80
  6. Step 6: Final answer
    x = 22,505.07

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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.