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Finding the Fourth Proportional to 18,937.35, 28,405.91 and 5,789.67

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Solution

The fourth proportional to 18,937.35, 28,405.91 and 5,789.67 is: 8,684.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,937.35 : 28,405.91 = 5,789.67 : x
  2. Step 2: Convert to fraction form
    18,937.35/28,405.91 = 5,789.67/x
  3. Step 3: Cross multiply
    18,937.35x = 28,405.91 × 5,789.67
  4. Step 4: Simplify right side
    18,937.35x = 164,460,816.00
  5. Step 5: Solve for x
    x = 164,460,816.00/18,937.35
  6. Step 6: Final answer
    x = 8,684.47

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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.