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Finding the Fourth Proportional to 21,413.92, 32,130.60 and 12,665.92

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Solution

The fourth proportional to 21,413.92, 32,130.60 and 12,665.92 is: 19,004.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,413.92 : 32,130.60 = 12,665.92 : x
  2. Step 2: Convert to fraction form
    21,413.92/32,130.60 = 12,665.92/x
  3. Step 3: Cross multiply
    21,413.92x = 32,130.60 × 12,665.92
  4. Step 4: Simplify right side
    21,413.92x = 406,963,609.15
  5. Step 5: Solve for x
    x = 406,963,609.15/21,413.92
  6. Step 6: Final answer
    x = 19,004.63

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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.