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Finding the Fourth Proportional to 13,413.80, 18,510.80 and 7,445.72

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Solution

The fourth proportional to 13,413.80, 18,510.80 and 7,445.72 is: 10,274.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,413.80 : 18,510.80 = 7,445.72 : x
  2. Step 2: Convert to fraction form
    13,413.80/18,510.80 = 7,445.72/x
  3. Step 3: Cross multiply
    13,413.80x = 18,510.80 × 7,445.72
  4. Step 4: Simplify right side
    13,413.80x = 137,826,233.78
  5. Step 5: Solve for x
    x = 137,826,233.78/13,413.80
  6. Step 6: Final answer
    x = 10,274.96

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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.