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Finding the Fourth Proportional to 12,921.66, 17,838.66 and 8,694.95

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Solution

The fourth proportional to 12,921.66, 17,838.66 and 8,694.95 is: 12,003.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,921.66 : 17,838.66 = 8,694.95 : x
  2. Step 2: Convert to fraction form
    12,921.66/17,838.66 = 8,694.95/x
  3. Step 3: Cross multiply
    12,921.66x = 17,838.66 × 8,694.95
  4. Step 4: Simplify right side
    12,921.66x = 155,106,200.18
  5. Step 5: Solve for x
    x = 155,106,200.18/12,921.66
  6. Step 6: Final answer
    x = 12,003.58

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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.