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Finding the Fourth Proportional to 7,876.63, 10,869.96 and 4,339.63

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Solution

The fourth proportional to 7,876.63, 10,869.96 and 4,339.63 is: 5,988.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,876.63 : 10,869.96 = 4,339.63 : x
  2. Step 2: Convert to fraction form
    7,876.63/10,869.96 = 4,339.63/x
  3. Step 3: Cross multiply
    7,876.63x = 10,869.96 × 4,339.63
  4. Step 4: Simplify right side
    7,876.63x = 47,171,604.51
  5. Step 5: Solve for x
    x = 47,171,604.51/7,876.63
  6. Step 6: Final answer
    x = 5,988.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.