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Finding the Fourth Proportional to 21,366.36, 29,484.36 and 12,413.16

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Solution

The fourth proportional to 21,366.36, 29,484.36 and 12,413.16 is: 17,129.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,366.36 : 29,484.36 = 12,413.16 : x
  2. Step 2: Convert to fraction form
    21,366.36/29,484.36 = 12,413.16/x
  3. Step 3: Cross multiply
    21,366.36x = 29,484.36 × 12,413.16
  4. Step 4: Simplify right side
    21,366.36x = 365,994,078.18
  5. Step 5: Solve for x
    x = 365,994,078.18/21,366.36
  6. Step 6: Final answer
    x = 17,129.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.