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Finding the Fourth Proportional to 21,413.28, 32,120.28 and 5,831.28

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Solution

The fourth proportional to 21,413.28, 32,120.28 and 5,831.28 is: 8,747.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,413.28 : 32,120.28 = 5,831.28 : x
  2. Step 2: Convert to fraction form
    21,413.28/32,120.28 = 5,831.28/x
  3. Step 3: Cross multiply
    21,413.28x = 32,120.28 × 5,831.28
  4. Step 4: Simplify right side
    21,413.28x = 187,302,346.36
  5. Step 5: Solve for x
    x = 187,302,346.36/21,413.28
  6. Step 6: Final answer
    x = 8,747.02

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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.