Home / 11,331.40-16,986.30-8,831.20

Finding the Fourth Proportional to 11,331.40, 16,986.30 and 8,831.20

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Solution

The fourth proportional to 11,331.40, 16,986.30 and 8,831.20 is: 13,238.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,331.40 : 16,986.30 = 8,831.20 : x
  2. Step 2: Convert to fraction form
    11,331.40/16,986.30 = 8,831.20/x
  3. Step 3: Cross multiply
    11,331.40x = 16,986.30 × 8,831.20
  4. Step 4: Simplify right side
    11,331.40x = 150,009,412.56
  5. Step 5: Solve for x
    x = 150,009,412.56/11,331.40
  6. Step 6: Final answer
    x = 13,238.38

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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.