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Finding the Fourth Proportional to 28,703.80, 43,038.09 and 11,153.14

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Solution

The fourth proportional to 28,703.80, 43,038.09 and 11,153.14 is: 16,722.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,703.80 : 43,038.09 = 11,153.14 : x
  2. Step 2: Convert to fraction form
    28,703.80/43,038.09 = 11,153.14/x
  3. Step 3: Cross multiply
    28,703.80x = 43,038.09 × 11,153.14
  4. Step 4: Simplify right side
    28,703.80x = 480,009,843.10
  5. Step 5: Solve for x
    x = 480,009,843.10/28,703.80
  6. Step 6: Final answer
    x = 16,722.87

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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.