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Finding the Fourth Proportional to 13,937.40, 20,889.90 and 5,613.30

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Solution

The fourth proportional to 13,937.40, 20,889.90 and 5,613.30 is: 8,413.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,937.40 : 20,889.90 = 5,613.30 : x
  2. Step 2: Convert to fraction form
    13,937.40/20,889.90 = 5,613.30/x
  3. Step 3: Cross multiply
    13,937.40x = 20,889.90 × 5,613.30
  4. Step 4: Simplify right side
    13,937.40x = 117,261,275.67
  5. Step 5: Solve for x
    x = 117,261,275.67/13,937.40
  6. Step 6: Final answer
    x = 8,413.43

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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.