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Finding the Fourth Proportional to 19,168.96, 28,763.16 and 13,638.28

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Solution

The fourth proportional to 19,168.96, 28,763.16 and 13,638.28 is: 20,464.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,168.96 : 28,763.16 = 13,638.28 : x
  2. Step 2: Convert to fraction form
    19,168.96/28,763.16 = 13,638.28/x
  3. Step 3: Cross multiply
    19,168.96x = 28,763.16 × 13,638.28
  4. Step 4: Simplify right side
    19,168.96x = 392,280,029.76
  5. Step 5: Solve for x
    x = 392,280,029.76/19,168.96
  6. Step 6: Final answer
    x = 20,464.34

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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.