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Finding the Fourth Proportional to 7,920.78, 10,930.52 and 4,384.02

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Solution

The fourth proportional to 7,920.78, 10,930.52 and 4,384.02 is: 6,049.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.78 : 10,930.52 = 4,384.02 : x
  2. Step 2: Convert to fraction form
    7,920.78/10,930.52 = 4,384.02/x
  3. Step 3: Cross multiply
    7,920.78x = 10,930.52 × 4,384.02
  4. Step 4: Simplify right side
    7,920.78x = 47,919,596.37
  5. Step 5: Solve for x
    x = 47,919,596.37/7,920.78
  6. Step 6: Final answer
    x = 6,049.86

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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.