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Finding the Fourth Proportional to 18,973.11, 28,461.48 and 7,879.56

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Solution

The fourth proportional to 18,973.11, 28,461.48 and 7,879.56 is: 11,820.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,973.11 : 28,461.48 = 7,879.56 : x
  2. Step 2: Convert to fraction form
    18,973.11/28,461.48 = 7,879.56/x
  3. Step 3: Cross multiply
    18,973.11x = 28,461.48 × 7,879.56
  4. Step 4: Simplify right side
    18,973.11x = 224,263,939.35
  5. Step 5: Solve for x
    x = 224,263,939.35/18,973.11
  6. Step 6: Final answer
    x = 11,820.09

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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.