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Finding the Fourth Proportional to 13,768.02, 18,999.72 and 7,480.38

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Solution

The fourth proportional to 13,768.02, 18,999.72 and 7,480.38 is: 10,322.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,768.02 : 18,999.72 = 7,480.38 : x
  2. Step 2: Convert to fraction form
    13,768.02/18,999.72 = 7,480.38/x
  3. Step 3: Cross multiply
    13,768.02x = 18,999.72 × 7,480.38
  4. Step 4: Simplify right side
    13,768.02x = 142,125,125.49
  5. Step 5: Solve for x
    x = 142,125,125.49/13,768.02
  6. Step 6: Final answer
    x = 10,322.84

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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.