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Finding the Fourth Proportional to 12,159.40, 18,230.94 and 6,239.88

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Solution

The fourth proportional to 12,159.40, 18,230.94 and 6,239.88 is: 9,355.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,159.40 : 18,230.94 = 6,239.88 : x
  2. Step 2: Convert to fraction form
    12,159.40/18,230.94 = 6,239.88/x
  3. Step 3: Cross multiply
    12,159.40x = 18,230.94 × 6,239.88
  4. Step 4: Simplify right side
    12,159.40x = 113,758,877.89
  5. Step 5: Solve for x
    x = 113,758,877.89/12,159.40
  6. Step 6: Final answer
    x = 9,355.63

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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.