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Finding the Fourth Proportional to 18,847.40, 28,274.04 and 5,698.40

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Solution

The fourth proportional to 18,847.40, 28,274.04 and 5,698.40 is: 8,548.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,847.40 : 28,274.04 = 5,698.40 : x
  2. Step 2: Convert to fraction form
    18,847.40/28,274.04 = 5,698.40/x
  3. Step 3: Cross multiply
    18,847.40x = 28,274.04 × 5,698.40
  4. Step 4: Simplify right side
    18,847.40x = 161,116,789.54
  5. Step 5: Solve for x
    x = 161,116,789.54/18,847.40
  6. Step 6: Final answer
    x = 8,548.49

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Double scale
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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.