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Finding the Fourth Proportional to 18,783.68, 28,181.28 and 7,100.48

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Solution

The fourth proportional to 18,783.68, 28,181.28 and 7,100.48 is: 10,652.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.68 : 28,181.28 = 7,100.48 : x
  2. Step 2: Convert to fraction form
    18,783.68/28,181.28 = 7,100.48/x
  3. Step 3: Cross multiply
    18,783.68x = 28,181.28 × 7,100.48
  4. Step 4: Simplify right side
    18,783.68x = 200,100,615.01
  5. Step 5: Solve for x
    x = 200,100,615.01/18,783.68
  6. Step 6: Final answer
    x = 10,652.90

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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.