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Finding the Fourth Proportional to 18,984.68, 28,477.02 and 7,289.70

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Solution

The fourth proportional to 18,984.68, 28,477.02 and 7,289.70 is: 10,934.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,984.68 : 28,477.02 = 7,289.70 : x
  2. Step 2: Convert to fraction form
    18,984.68/28,477.02 = 7,289.70/x
  3. Step 3: Cross multiply
    18,984.68x = 28,477.02 × 7,289.70
  4. Step 4: Simplify right side
    18,984.68x = 207,588,812.24
  5. Step 5: Solve for x
    x = 207,588,812.24/18,984.68
  6. Step 6: Final answer
    x = 10,934.54

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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.