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Finding the Fourth Proportional to 18,601.20, 27,901.80 and 12,696.30

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Solution

The fourth proportional to 18,601.20, 27,901.80 and 12,696.30 is: 19,044.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,601.20 : 27,901.80 = 12,696.30 : x
  2. Step 2: Convert to fraction form
    18,601.20/27,901.80 = 12,696.30/x
  3. Step 3: Cross multiply
    18,601.20x = 27,901.80 × 12,696.30
  4. Step 4: Simplify right side
    18,601.20x = 354,249,623.34
  5. Step 5: Solve for x
    x = 354,249,623.34/18,601.20
  6. Step 6: Final answer
    x = 19,044.45

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1.5x scale

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.