Home / 19,231.40-28,831.10-8,146.60

Finding the Fourth Proportional to 19,231.40, 28,831.10 and 8,146.60

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Solution

The fourth proportional to 19,231.40, 28,831.10 and 8,146.60 is: 12,213.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,231.40 : 28,831.10 = 8,146.60 : x
  2. Step 2: Convert to fraction form
    19,231.40/28,831.10 = 8,146.60/x
  3. Step 3: Cross multiply
    19,231.40x = 28,831.10 × 8,146.60
  4. Step 4: Simplify right side
    19,231.40x = 234,875,439.26
  5. Step 5: Solve for x
    x = 234,875,439.26/19,231.40
  6. Step 6: Final answer
    x = 12,213.12

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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.