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Finding the Fourth Proportional to 18,859.92, 28,289.75 and 4,628.22

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Solution

The fourth proportional to 18,859.92, 28,289.75 and 4,628.22 is: 6,942.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,859.92 : 28,289.75 = 4,628.22 : x
  2. Step 2: Convert to fraction form
    18,859.92/28,289.75 = 4,628.22/x
  3. Step 3: Cross multiply
    18,859.92x = 28,289.75 × 4,628.22
  4. Step 4: Simplify right side
    18,859.92x = 130,931,163.60
  5. Step 5: Solve for x
    x = 130,931,163.60/18,859.92
  6. Step 6: Final answer
    x = 6,942.30

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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.