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Finding the Fourth Proportional to 8,615.54, 11,889.71 and 4,838.79

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Solution

The fourth proportional to 8,615.54, 11,889.71 and 4,838.79 is: 6,677.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,615.54 : 11,889.71 = 4,838.79 : x
  2. Step 2: Convert to fraction form
    8,615.54/11,889.71 = 4,838.79/x
  3. Step 3: Cross multiply
    8,615.54x = 11,889.71 × 4,838.79
  4. Step 4: Simplify right side
    8,615.54x = 57,531,795.12
  5. Step 5: Solve for x
    x = 57,531,795.12/8,615.54
  6. Step 6: Final answer
    x = 6,677.68

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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.