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Finding the Fourth Proportional to 18,580.40, 27,871.50 and 7,485.60

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Solution

The fourth proportional to 18,580.40, 27,871.50 and 7,485.60 is: 11,228.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,580.40 : 27,871.50 = 7,485.60 : x
  2. Step 2: Convert to fraction form
    18,580.40/27,871.50 = 7,485.60/x
  3. Step 3: Cross multiply
    18,580.40x = 27,871.50 × 7,485.60
  4. Step 4: Simplify right side
    18,580.40x = 208,634,900.40
  5. Step 5: Solve for x
    x = 208,634,900.40/18,580.40
  6. Step 6: Final answer
    x = 11,228.76

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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.