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Finding the Fourth Proportional to 8,347.91, 11,516.78 and 4,989.48

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Solution

The fourth proportional to 8,347.91, 11,516.78 and 4,989.48 is: 6,883.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,347.91 : 11,516.78 = 4,989.48 : x
  2. Step 2: Convert to fraction form
    8,347.91/11,516.78 = 4,989.48/x
  3. Step 3: Cross multiply
    8,347.91x = 11,516.78 × 4,989.48
  4. Step 4: Simplify right side
    8,347.91x = 57,462,718.53
  5. Step 5: Solve for x
    x = 57,462,718.53/8,347.91
  6. Step 6: Final answer
    x = 6,883.49

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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.