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Finding the Fourth Proportional to 18,783.88, 28,173.66 and 7,098.28

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Solution

The fourth proportional to 18,783.88, 28,173.66 and 7,098.28 is: 10,646.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783.88 : 28,173.66 = 7,098.28 : x
  2. Step 2: Convert to fraction form
    18,783.88/28,173.66 = 7,098.28/x
  3. Step 3: Cross multiply
    18,783.88x = 28,173.66 × 7,098.28
  4. Step 4: Simplify right side
    18,783.88x = 199,984,527.30
  5. Step 5: Solve for x
    x = 199,984,527.30/18,783.88
  6. Step 6: Final answer
    x = 10,646.60

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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.