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Finding the Fourth Proportional to 14,485.44, 21,729.88 and 5,123.54

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Solution

The fourth proportional to 14,485.44, 21,729.88 and 5,123.54 is: 7,685.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,485.44 : 21,729.88 = 5,123.54 : x
  2. Step 2: Convert to fraction form
    14,485.44/21,729.88 = 5,123.54/x
  3. Step 3: Cross multiply
    14,485.44x = 21,729.88 × 5,123.54
  4. Step 4: Simplify right side
    14,485.44x = 111,333,909.38
  5. Step 5: Solve for x
    x = 111,333,909.38/14,485.44
  6. Step 6: Final answer
    x = 7,685.92

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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.