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Finding the Fourth Proportional to 28,783, 39,720.66 and 16,207.96

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Solution

The fourth proportional to 28,783, 39,720.66 and 16,207.96 is: 22,367.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,783 : 39,720.66 = 16,207.96 : x
  2. Step 2: Convert to fraction form
    28,783/39,720.66 = 16,207.96/x
  3. Step 3: Cross multiply
    28,783x = 39,720.66 × 16,207.96
  4. Step 4: Simplify right side
    28,783x = 643,790,868.45
  5. Step 5: Solve for x
    x = 643,790,868.45/28,783
  6. Step 6: Final answer
    x = 22,367.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.