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Finding the Fourth Proportional to 28,959.78, 43,443.09 and 9,231.42

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Solution

The fourth proportional to 28,959.78, 43,443.09 and 9,231.42 is: 13,848.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,959.78 : 43,443.09 = 9,231.42 : x
  2. Step 2: Convert to fraction form
    28,959.78/43,443.09 = 9,231.42/x
  3. Step 3: Cross multiply
    28,959.78x = 43,443.09 × 9,231.42
  4. Step 4: Simplify right side
    28,959.78x = 401,041,409.89
  5. Step 5: Solve for x
    x = 401,041,409.89/28,959.78
  6. Step 6: Final answer
    x = 13,848.22

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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.