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Finding the Fourth Proportional to 18,958.07, 28,442.14 and 6,478.07

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Solution

The fourth proportional to 18,958.07, 28,442.14 and 6,478.07 is: 9,718.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,958.07 : 28,442.14 = 6,478.07 : x
  2. Step 2: Convert to fraction form
    18,958.07/28,442.14 = 6,478.07/x
  3. Step 3: Cross multiply
    18,958.07x = 28,442.14 × 6,478.07
  4. Step 4: Simplify right side
    18,958.07x = 184,250,173.87
  5. Step 5: Solve for x
    x = 184,250,173.87/18,958.07
  6. Step 6: Final answer
    x = 9,718.83

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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.