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Finding the Fourth Proportional to 7,917.08, 10,920.81 and 5,228.32

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Solution

The fourth proportional to 7,917.08, 10,920.81 and 5,228.32 is: 7,211.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,917.08 : 10,920.81 = 5,228.32 : x
  2. Step 2: Convert to fraction form
    7,917.08/10,920.81 = 5,228.32/x
  3. Step 3: Cross multiply
    7,917.08x = 10,920.81 × 5,228.32
  4. Step 4: Simplify right side
    7,917.08x = 57,097,503.57
  5. Step 5: Solve for x
    x = 57,097,503.57/7,917.08
  6. Step 6: Final answer
    x = 7,211.94

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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.