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Finding the Fourth Proportional to 13,393.96, 18,485.62 and 7,729.63

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Solution

The fourth proportional to 13,393.96, 18,485.62 and 7,729.63 is: 10,668.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,393.96 : 18,485.62 = 7,729.63 : x
  2. Step 2: Convert to fraction form
    13,393.96/18,485.62 = 7,729.63/x
  3. Step 3: Cross multiply
    13,393.96x = 18,485.62 × 7,729.63
  4. Step 4: Simplify right side
    13,393.96x = 142,886,937.38
  5. Step 5: Solve for x
    x = 142,886,937.38/13,393.96
  6. Step 6: Final answer
    x = 10,668.01

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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.