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Finding the Fourth Proportional to 28,360.80, 42,557.40 and 10,843.20

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Solution

The fourth proportional to 28,360.80, 42,557.40 and 10,843.20 is: 16,270.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,360.80 : 42,557.40 = 10,843.20 : x
  2. Step 2: Convert to fraction form
    28,360.80/42,557.40 = 10,843.20/x
  3. Step 3: Cross multiply
    28,360.80x = 42,557.40 × 10,843.20
  4. Step 4: Simplify right side
    28,360.80x = 461,458,399.68
  5. Step 5: Solve for x
    x = 461,458,399.68/28,360.80
  6. Step 6: Final answer
    x = 16,270.99

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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.