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Finding the Fourth Proportional to 28,699.66, 43,049.49 and 8,978.32

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Solution

The fourth proportional to 28,699.66, 43,049.49 and 8,978.32 is: 13,467.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,699.66 : 43,049.49 = 8,978.32 : x
  2. Step 2: Convert to fraction form
    28,699.66/43,049.49 = 8,978.32/x
  3. Step 3: Cross multiply
    28,699.66x = 43,049.49 × 8,978.32
  4. Step 4: Simplify right side
    28,699.66x = 386,512,097.06
  5. Step 5: Solve for x
    x = 386,512,097.06/28,699.66
  6. Step 6: Final answer
    x = 13,467.48

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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.