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Finding the Fourth Proportional to 7,762.74, 11,639.70 and 5,300.54

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Solution

The fourth proportional to 7,762.74, 11,639.70 and 5,300.54 is: 7,947.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,762.74 : 11,639.70 = 5,300.54 : x
  2. Step 2: Convert to fraction form
    7,762.74/11,639.70 = 5,300.54/x
  3. Step 3: Cross multiply
    7,762.74x = 11,639.70 × 5,300.54
  4. Step 4: Simplify right side
    7,762.74x = 61,696,680.89
  5. Step 5: Solve for x
    x = 61,696,680.89/7,762.74
  6. Step 6: Final answer
    x = 7,947.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.