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Finding the Fourth Proportional to 18,859.88, 28,292.88 and 6,380.67

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Solution

The fourth proportional to 18,859.88, 28,292.88 and 6,380.67 is: 9,572.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,859.88 : 28,292.88 = 6,380.67 : x
  2. Step 2: Convert to fraction form
    18,859.88/28,292.88 = 6,380.67/x
  3. Step 3: Cross multiply
    18,859.88x = 28,292.88 × 6,380.67
  4. Step 4: Simplify right side
    18,859.88x = 180,527,530.63
  5. Step 5: Solve for x
    x = 180,527,530.63/18,859.88
  6. Step 6: Final answer
    x = 9,572.04

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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.