Home / 9,189.36-12,679.56-5,209.56

Finding the Fourth Proportional to 9,189.36, 12,679.56 and 5,209.56

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Solution

The fourth proportional to 9,189.36, 12,679.56 and 5,209.56 is: 7,188.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,189.36 : 12,679.56 = 5,209.56 : x
  2. Step 2: Convert to fraction form
    9,189.36/12,679.56 = 5,209.56/x
  3. Step 3: Cross multiply
    9,189.36x = 12,679.56 × 5,209.56
  4. Step 4: Simplify right side
    9,189.36x = 66,054,928.59
  5. Step 5: Solve for x
    x = 66,054,928.59/9,189.36
  6. Step 6: Final answer
    x = 7,188.20

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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.