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Finding the Fourth Proportional to 18,679.60, 28,019.40 and 6,201.55

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Solution

The fourth proportional to 18,679.60, 28,019.40 and 6,201.55 is: 9,302.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679.60 : 28,019.40 = 6,201.55 : x
  2. Step 2: Convert to fraction form
    18,679.60/28,019.40 = 6,201.55/x
  3. Step 3: Cross multiply
    18,679.60x = 28,019.40 × 6,201.55
  4. Step 4: Simplify right side
    18,679.60x = 173,763,710.07
  5. Step 5: Solve for x
    x = 173,763,710.07/18,679.60
  6. Step 6: Final answer
    x = 9,302.33

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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.