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Finding the Fourth Proportional to 15,846.54, 21,868.14 and 8,772.94

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Solution

The fourth proportional to 15,846.54, 21,868.14 and 8,772.94 is: 12,106.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,846.54 : 21,868.14 = 8,772.94 : x
  2. Step 2: Convert to fraction form
    15,846.54/21,868.14 = 8,772.94/x
  3. Step 3: Cross multiply
    15,846.54x = 21,868.14 × 8,772.94
  4. Step 4: Simplify right side
    15,846.54x = 191,847,880.13
  5. Step 5: Solve for x
    x = 191,847,880.13/15,846.54
  6. Step 6: Final answer
    x = 12,106.61

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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.