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Finding the Fourth Proportional to 28,931.47, 43,413.59 and 11,413.60

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Solution

The fourth proportional to 28,931.47, 43,413.59 and 11,413.60 is: 17,126.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,931.47 : 43,413.59 = 11,413.60 : x
  2. Step 2: Convert to fraction form
    28,931.47/43,413.59 = 11,413.60/x
  3. Step 3: Cross multiply
    28,931.47x = 43,413.59 × 11,413.60
  4. Step 4: Simplify right side
    28,931.47x = 495,505,270.82
  5. Step 5: Solve for x
    x = 495,505,270.82/28,931.47
  6. Step 6: Final answer
    x = 17,126.86

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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.