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Finding the Fourth Proportional to 18,831.93, 28,231.11 and 7,153.35

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Solution

The fourth proportional to 18,831.93, 28,231.11 and 7,153.35 is: 10,723.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,831.93 : 28,231.11 = 7,153.35 : x
  2. Step 2: Convert to fraction form
    18,831.93/28,231.11 = 7,153.35/x
  3. Step 3: Cross multiply
    18,831.93x = 28,231.11 × 7,153.35
  4. Step 4: Simplify right side
    18,831.93x = 201,947,010.72
  5. Step 5: Solve for x
    x = 201,947,010.72/18,831.93
  6. Step 6: Final answer
    x = 10,723.65

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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.