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Finding the Fourth Proportional to 12,485.53, 18,719.07 and 7,553.98

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Solution

The fourth proportional to 12,485.53, 18,719.07 and 7,553.98 is: 11,325.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,485.53 : 18,719.07 = 7,553.98 : x
  2. Step 2: Convert to fraction form
    12,485.53/18,719.07 = 7,553.98/x
  3. Step 3: Cross multiply
    12,485.53x = 18,719.07 × 7,553.98
  4. Step 4: Simplify right side
    12,485.53x = 141,403,480.40
  5. Step 5: Solve for x
    x = 141,403,480.40/12,485.53
  6. Step 6: Final answer
    x = 11,325.39

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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.