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Finding the Fourth Proportional to 28,413.63, 42,620.42 and 7,637.13

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Solution

The fourth proportional to 28,413.63, 42,620.42 and 7,637.13 is: 11,455.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,413.63 : 42,620.42 = 7,637.13 : x
  2. Step 2: Convert to fraction form
    28,413.63/42,620.42 = 7,637.13/x
  3. Step 3: Cross multiply
    28,413.63x = 42,620.42 × 7,637.13
  4. Step 4: Simplify right side
    28,413.63x = 325,497,650.01
  5. Step 5: Solve for x
    x = 325,497,650.01/28,413.63
  6. Step 6: Final answer
    x = 11,455.69

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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.