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Finding the Fourth Proportional to 18,979.37, 28,473.07 and 7,133.25

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Solution

The fourth proportional to 18,979.37, 28,473.07 and 7,133.25 is: 10,701.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,979.37 : 28,473.07 = 7,133.25 : x
  2. Step 2: Convert to fraction form
    18,979.37/28,473.07 = 7,133.25/x
  3. Step 3: Cross multiply
    18,979.37x = 28,473.07 × 7,133.25
  4. Step 4: Simplify right side
    18,979.37x = 203,105,508.74
  5. Step 5: Solve for x
    x = 203,105,508.74/18,979.37
  6. Step 6: Final answer
    x = 10,701.38

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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.