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Finding the Fourth Proportional to 18,906.13, 28,339.42 and 7,054.75

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Solution

The fourth proportional to 18,906.13, 28,339.42 and 7,054.75 is: 10,574.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,906.13 : 28,339.42 = 7,054.75 : x
  2. Step 2: Convert to fraction form
    18,906.13/28,339.42 = 7,054.75/x
  3. Step 3: Cross multiply
    18,906.13x = 28,339.42 × 7,054.75
  4. Step 4: Simplify right side
    18,906.13x = 199,927,523.25
  5. Step 5: Solve for x
    x = 199,927,523.25/18,906.13
  6. Step 6: Final answer
    x = 10,574.75

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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.