Home / 12,887.38-19,305.43-8,491.51

Finding the Fourth Proportional to 12,887.38, 19,305.43 and 8,491.51

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Solution

The fourth proportional to 12,887.38, 19,305.43 and 8,491.51 is: 12,720.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,887.38 : 19,305.43 = 8,491.51 : x
  2. Step 2: Convert to fraction form
    12,887.38/19,305.43 = 8,491.51/x
  3. Step 3: Cross multiply
    12,887.38x = 19,305.43 × 8,491.51
  4. Step 4: Simplify right side
    12,887.38x = 163,932,251.90
  5. Step 5: Solve for x
    x = 163,932,251.90/12,887.38
  6. Step 6: Final answer
    x = 12,720.37

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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.