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Finding the Fourth Proportional to 7,913.40, 10,920.60 and 4,930.44

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Solution

The fourth proportional to 7,913.40, 10,920.60 and 4,930.44 is: 6,804.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,913.40 : 10,920.60 = 4,930.44 : x
  2. Step 2: Convert to fraction form
    7,913.40/10,920.60 = 4,930.44/x
  3. Step 3: Cross multiply
    7,913.40x = 10,920.60 × 4,930.44
  4. Step 4: Simplify right side
    7,913.40x = 53,843,363.06
  5. Step 5: Solve for x
    x = 53,843,363.06/7,913.40
  6. Step 6: Final answer
    x = 6,804.07

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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.