Home / 9,188.76-12,679.38-5,209.68

Finding the Fourth Proportional to 9,188.76, 12,679.38 and 5,209.68

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Solution

The fourth proportional to 9,188.76, 12,679.38 and 5,209.68 is: 7,188.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,188.76 : 12,679.38 = 5,209.68 : x
  2. Step 2: Convert to fraction form
    9,188.76/12,679.38 = 5,209.68/x
  3. Step 3: Cross multiply
    9,188.76x = 12,679.38 × 5,209.68
  4. Step 4: Simplify right side
    9,188.76x = 66,055,512.40
  5. Step 5: Solve for x
    x = 66,055,512.40/9,188.76
  6. Step 6: Final answer
    x = 7,188.73

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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.