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Finding the Fourth Proportional to 12,488.65, 18,716.83 and 9,343.98

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Solution

The fourth proportional to 12,488.65, 18,716.83 and 9,343.98 is: 14,003.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,488.65 : 18,716.83 = 9,343.98 : x
  2. Step 2: Convert to fraction form
    12,488.65/18,716.83 = 9,343.98/x
  3. Step 3: Cross multiply
    12,488.65x = 18,716.83 × 9,343.98
  4. Step 4: Simplify right side
    12,488.65x = 174,889,705.70
  5. Step 5: Solve for x
    x = 174,889,705.70/12,488.65
  6. Step 6: Final answer
    x = 14,003.89

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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.