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Finding the Fourth Proportional to 28,825.20, 43,237.80 and 20,368.80

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Solution

The fourth proportional to 28,825.20, 43,237.80 and 20,368.80 is: 30,553.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,825.20 : 43,237.80 = 20,368.80 : x
  2. Step 2: Convert to fraction form
    28,825.20/43,237.80 = 20,368.80/x
  3. Step 3: Cross multiply
    28,825.20x = 43,237.80 × 20,368.80
  4. Step 4: Simplify right side
    28,825.20x = 880,702,100.64
  5. Step 5: Solve for x
    x = 880,702,100.64/28,825.20
  6. Step 6: Final answer
    x = 30,553.20

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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.