Home / 13,109.36-18,076.56-11,865.20

Finding the Fourth Proportional to 13,109.36, 18,076.56 and 11,865.20

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Solution

The fourth proportional to 13,109.36, 18,076.56 and 11,865.20 is: 16,360.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,109.36 : 18,076.56 = 11,865.20 : x
  2. Step 2: Convert to fraction form
    13,109.36/18,076.56 = 11,865.20/x
  3. Step 3: Cross multiply
    13,109.36x = 18,076.56 × 11,865.20
  4. Step 4: Simplify right side
    13,109.36x = 214,481,999.71
  5. Step 5: Solve for x
    x = 214,481,999.71/13,109.36
  6. Step 6: Final answer
    x = 16,360.98

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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.