Home / 18,126.19-27,189.60-4,978.47

Finding the Fourth Proportional to 18,126.19, 27,189.60 and 4,978.47

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Solution

The fourth proportional to 18,126.19, 27,189.60 and 4,978.47 is: 7,467.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,126.19 : 27,189.60 = 4,978.47 : x
  2. Step 2: Convert to fraction form
    18,126.19/27,189.60 = 4,978.47/x
  3. Step 3: Cross multiply
    18,126.19x = 27,189.60 × 4,978.47
  4. Step 4: Simplify right side
    18,126.19x = 135,362,607.91
  5. Step 5: Solve for x
    x = 135,362,607.91/18,126.19
  6. Step 6: Final answer
    x = 7,467.79

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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.