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Finding the Fourth Proportional to 12,359.40, 18,541.80 and 4,039.80

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Solution

The fourth proportional to 12,359.40, 18,541.80 and 4,039.80 is: 6,060.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,359.40 : 18,541.80 = 4,039.80 : x
  2. Step 2: Convert to fraction form
    12,359.40/18,541.80 = 4,039.80/x
  3. Step 3: Cross multiply
    12,359.40x = 18,541.80 × 4,039.80
  4. Step 4: Simplify right side
    12,359.40x = 74,905,163.64
  5. Step 5: Solve for x
    x = 74,905,163.64/12,359.40
  6. Step 6: Final answer
    x = 6,060.58

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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.