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Finding the Fourth Proportional to 20,647, 28,567.92 and 17,999.92

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Solution

The fourth proportional to 20,647, 28,567.92 and 17,999.92 is: 24,905.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647 : 28,567.92 = 17,999.92 : x
  2. Step 2: Convert to fraction form
    20,647/28,567.92 = 17,999.92/x
  3. Step 3: Cross multiply
    20,647x = 28,567.92 × 17,999.92
  4. Step 4: Simplify right side
    20,647x = 514,220,274.57
  5. Step 5: Solve for x
    x = 514,220,274.57/20,647
  6. Step 6: Final answer
    x = 24,905.33

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1.5x scale

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.