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Finding the Fourth Proportional to 7,889.49, 11,818.98 and 4,186.71

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Solution

The fourth proportional to 7,889.49, 11,818.98 and 4,186.71 is: 6,271.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,889.49 : 11,818.98 = 4,186.71 : x
  2. Step 2: Convert to fraction form
    7,889.49/11,818.98 = 4,186.71/x
  3. Step 3: Cross multiply
    7,889.49x = 11,818.98 × 4,186.71
  4. Step 4: Simplify right side
    7,889.49x = 49,482,641.76
  5. Step 5: Solve for x
    x = 49,482,641.76/7,889.49
  6. Step 6: Final answer
    x = 6,271.97

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.