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Finding the Fourth Proportional to 8,572.11, 12,879.74 and 5,453.51

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Solution

The fourth proportional to 8,572.11, 12,879.74 and 5,453.51 is: 8,193.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,572.11 : 12,879.74 = 5,453.51 : x
  2. Step 2: Convert to fraction form
    8,572.11/12,879.74 = 5,453.51/x
  3. Step 3: Cross multiply
    8,572.11x = 12,879.74 × 5,453.51
  4. Step 4: Simplify right side
    8,572.11x = 70,239,699.22
  5. Step 5: Solve for x
    x = 70,239,699.22/8,572.11
  6. Step 6: Final answer
    x = 8,193.98

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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.