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Finding the Fourth Proportional to 18,413.03, 25,431.30 and 13,399.74

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Solution

The fourth proportional to 18,413.03, 25,431.30 and 13,399.74 is: 18,507.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,413.03 : 25,431.30 = 13,399.74 : x
  2. Step 2: Convert to fraction form
    18,413.03/25,431.30 = 13,399.74/x
  3. Step 3: Cross multiply
    18,413.03x = 25,431.30 × 13,399.74
  4. Step 4: Simplify right side
    18,413.03x = 340,772,807.86
  5. Step 5: Solve for x
    x = 340,772,807.86/18,413.03
  6. Step 6: Final answer
    x = 18,507.15

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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.