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Finding the Fourth Proportional to 28,939.56, 43,410.25 and 9,963.99

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Solution

The fourth proportional to 28,939.56, 43,410.25 and 9,963.99 is: 14,946.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,939.56 : 43,410.25 = 9,963.99 : x
  2. Step 2: Convert to fraction form
    28,939.56/43,410.25 = 9,963.99/x
  3. Step 3: Cross multiply
    28,939.56x = 43,410.25 × 9,963.99
  4. Step 4: Simplify right side
    28,939.56x = 432,539,271.99
  5. Step 5: Solve for x
    x = 432,539,271.99/28,939.56
  6. Step 6: Final answer
    x = 14,946.30

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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.