Home / 12,917.48-17,809-11,605.28

Finding the Fourth Proportional to 12,917.48, 17,809 and 11,605.28

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Solution

The fourth proportional to 12,917.48, 17,809 and 11,605.28 is: 15,999.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,917.48 : 17,809 = 11,605.28 : x
  2. Step 2: Convert to fraction form
    12,917.48/17,809 = 11,605.28/x
  3. Step 3: Cross multiply
    12,917.48x = 17,809 × 11,605.28
  4. Step 4: Simplify right side
    12,917.48x = 206,678,431.52
  5. Step 5: Solve for x
    x = 206,678,431.52/12,917.48
  6. Step 6: Final answer
    x = 15,999.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.