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Finding the Fourth Proportional to 18,990.63, 28,477.69 and 7,295.63

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Solution

The fourth proportional to 18,990.63, 28,477.69 and 7,295.63 is: 10,940.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,990.63 : 28,477.69 = 7,295.63 : x
  2. Step 2: Convert to fraction form
    18,990.63/28,477.69 = 7,295.63/x
  3. Step 3: Cross multiply
    18,990.63x = 28,477.69 × 7,295.63
  4. Step 4: Simplify right side
    18,990.63x = 207,762,528.87
  5. Step 5: Solve for x
    x = 207,762,528.87/18,990.63
  6. Step 6: Final answer
    x = 10,940.27

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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.