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Finding the Fourth Proportional to 13,005.88, 19,505.04 and 7,458.28

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Solution

The fourth proportional to 13,005.88, 19,505.04 and 7,458.28 is: 11,185.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,005.88 : 19,505.04 = 7,458.28 : x
  2. Step 2: Convert to fraction form
    13,005.88/19,505.04 = 7,458.28/x
  3. Step 3: Cross multiply
    13,005.88x = 19,505.04 × 7,458.28
  4. Step 4: Simplify right side
    13,005.88x = 145,474,049.73
  5. Step 5: Solve for x
    x = 145,474,049.73/13,005.88
  6. Step 6: Final answer
    x = 11,185.25

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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.