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Finding the Fourth Proportional to 19,009.54, 28,509.88 and 7,164.49

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Solution

The fourth proportional to 19,009.54, 28,509.88 and 7,164.49 is: 10,745.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,009.54 : 28,509.88 = 7,164.49 : x
  2. Step 2: Convert to fraction form
    19,009.54/28,509.88 = 7,164.49/x
  3. Step 3: Cross multiply
    19,009.54x = 28,509.88 × 7,164.49
  4. Step 4: Simplify right side
    19,009.54x = 204,258,873.22
  5. Step 5: Solve for x
    x = 204,258,873.22/19,009.54
  6. Step 6: Final answer
    x = 10,745.07

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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.