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Finding the Fourth Proportional to 28,850.80, 43,268.10 and 9,135.40

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Solution

The fourth proportional to 28,850.80, 43,268.10 and 9,135.40 is: 13,700.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,850.80 : 43,268.10 = 9,135.40 : x
  2. Step 2: Convert to fraction form
    28,850.80/43,268.10 = 9,135.40/x
  3. Step 3: Cross multiply
    28,850.80x = 43,268.10 × 9,135.40
  4. Step 4: Simplify right side
    28,850.80x = 395,271,400.74
  5. Step 5: Solve for x
    x = 395,271,400.74/28,850.80
  6. Step 6: Final answer
    x = 13,700.54

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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.