Home / 9,120.62-13,663.07-8,128.84

Finding the Fourth Proportional to 9,120.62, 13,663.07 and 8,128.84

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Solution

The fourth proportional to 9,120.62, 13,663.07 and 8,128.84 is: 12,177.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,120.62 : 13,663.07 = 8,128.84 : x
  2. Step 2: Convert to fraction form
    9,120.62/13,663.07 = 8,128.84/x
  3. Step 3: Cross multiply
    9,120.62x = 13,663.07 × 8,128.84
  4. Step 4: Simplify right side
    9,120.62x = 111,064,909.94
  5. Step 5: Solve for x
    x = 111,064,909.94/9,120.62
  6. Step 6: Final answer
    x = 12,177.34

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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.