Home / 13,129.08-18,119.87-8,349.47

Finding the Fourth Proportional to 13,129.08, 18,119.87 and 8,349.47

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Solution

The fourth proportional to 13,129.08, 18,119.87 and 8,349.47 is: 11,523.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,129.08 : 18,119.87 = 8,349.47 : x
  2. Step 2: Convert to fraction form
    13,129.08/18,119.87 = 8,349.47/x
  3. Step 3: Cross multiply
    13,129.08x = 18,119.87 × 8,349.47
  4. Step 4: Simplify right side
    13,129.08x = 151,291,269.22
  5. Step 5: Solve for x
    x = 151,291,269.22/13,129.08
  6. Step 6: Final answer
    x = 11,523.38

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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.