Home / 13,239.52-18,270.44-7,189.88

Finding the Fourth Proportional to 13,239.52, 18,270.44 and 7,189.88

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Solution

The fourth proportional to 13,239.52, 18,270.44 and 7,189.88 is: 9,921.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,239.52 : 18,270.44 = 7,189.88 : x
  2. Step 2: Convert to fraction form
    13,239.52/18,270.44 = 7,189.88/x
  3. Step 3: Cross multiply
    13,239.52x = 18,270.44 × 7,189.88
  4. Step 4: Simplify right side
    13,239.52x = 131,362,271.15
  5. Step 5: Solve for x
    x = 131,362,271.15/13,239.52
  6. Step 6: Final answer
    x = 9,921.98

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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.