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Finding the Fourth Proportional to 7,903.72, 10,906.14 and 4,920.51

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Solution

The fourth proportional to 7,903.72, 10,906.14 and 4,920.51 is: 6,789.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,903.72 : 10,906.14 = 4,920.51 : x
  2. Step 2: Convert to fraction form
    7,903.72/10,906.14 = 4,920.51/x
  3. Step 3: Cross multiply
    7,903.72x = 10,906.14 × 4,920.51
  4. Step 4: Simplify right side
    7,903.72x = 53,663,770.93
  5. Step 5: Solve for x
    x = 53,663,770.93/7,903.72
  6. Step 6: Final answer
    x = 6,789.69

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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.