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Finding the Fourth Proportional to 28,969.72, 43,460.70 and 9,245.80

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Solution

The fourth proportional to 28,969.72, 43,460.70 and 9,245.80 is: 13,870.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,969.72 : 43,460.70 = 9,245.80 : x
  2. Step 2: Convert to fraction form
    28,969.72/43,460.70 = 9,245.80/x
  3. Step 3: Cross multiply
    28,969.72x = 43,460.70 × 9,245.80
  4. Step 4: Simplify right side
    28,969.72x = 401,828,940.06
  5. Step 5: Solve for x
    x = 401,828,940.06/28,969.72
  6. Step 6: Final answer
    x = 13,870.65

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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.