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Finding the Fourth Proportional to 28,699.05, 43,048.50 and 7,639.08

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Solution

The fourth proportional to 28,699.05, 43,048.50 and 7,639.08 is: 11,458.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,699.05 : 43,048.50 = 7,639.08 : x
  2. Step 2: Convert to fraction form
    28,699.05/43,048.50 = 7,639.08/x
  3. Step 3: Cross multiply
    28,699.05x = 43,048.50 × 7,639.08
  4. Step 4: Simplify right side
    28,699.05x = 328,850,935.38
  5. Step 5: Solve for x
    x = 328,850,935.38/28,699.05
  6. Step 6: Final answer
    x = 11,458.60

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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.