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Finding the Fourth Proportional to 13,763.19, 20,640.75 and 5,865.63

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Solution

The fourth proportional to 13,763.19, 20,640.75 and 5,865.63 is: 8,796.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,763.19 : 20,640.75 = 5,865.63 : x
  2. Step 2: Convert to fraction form
    13,763.19/20,640.75 = 5,865.63/x
  3. Step 3: Cross multiply
    13,763.19x = 20,640.75 × 5,865.63
  4. Step 4: Simplify right side
    13,763.19x = 121,071,002.42
  5. Step 5: Solve for x
    x = 121,071,002.42/13,763.19
  6. Step 6: Final answer
    x = 8,796.73

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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.