Home / 11,128.21-15,357.67-6,412.79

Finding the Fourth Proportional to 11,128.21, 15,357.67 and 6,412.79

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Solution

The fourth proportional to 11,128.21, 15,357.67 and 6,412.79 is: 8,850.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,128.21 : 15,357.67 = 6,412.79 : x
  2. Step 2: Convert to fraction form
    11,128.21/15,357.67 = 6,412.79/x
  3. Step 3: Cross multiply
    11,128.21x = 15,357.67 × 6,412.79
  4. Step 4: Simplify right side
    11,128.21x = 98,485,534.96
  5. Step 5: Solve for x
    x = 98,485,534.96/11,128.21
  6. Step 6: Final answer
    x = 8,850.08

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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.