Home / 13,128.83-18,119.52-8,349.22

Finding the Fourth Proportional to 13,128.83, 18,119.52 and 8,349.22

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Solution

The fourth proportional to 13,128.83, 18,119.52 and 8,349.22 is: 11,523.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.83 : 18,119.52 = 8,349.22 : x
  2. Step 2: Convert to fraction form
    13,128.83/18,119.52 = 8,349.22/x
  3. Step 3: Cross multiply
    13,128.83x = 18,119.52 × 8,349.22
  4. Step 4: Simplify right side
    13,128.83x = 151,283,858.77
  5. Step 5: Solve for x
    x = 151,283,858.77/13,128.83
  6. Step 6: Final answer
    x = 11,523.03

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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.