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Finding the Fourth Proportional to 7,911.57, 10,917.09 and 4,374.75

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Solution

The fourth proportional to 7,911.57, 10,917.09 and 4,374.75 is: 6,036.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,911.57 : 10,917.09 = 4,374.75 : x
  2. Step 2: Convert to fraction form
    7,911.57/10,917.09 = 4,374.75/x
  3. Step 3: Cross multiply
    7,911.57x = 10,917.09 × 4,374.75
  4. Step 4: Simplify right side
    7,911.57x = 47,759,539.48
  5. Step 5: Solve for x
    x = 47,759,539.48/7,911.57
  6. Step 6: Final answer
    x = 6,036.67

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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.