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Finding the Fourth Proportional to 18,696.25, 28,050.45 and 13,079.71

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Solution

The fourth proportional to 18,696.25, 28,050.45 and 13,079.71 is: 19,623.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,696.25 : 28,050.45 = 13,079.71 : x
  2. Step 2: Convert to fraction form
    18,696.25/28,050.45 = 13,079.71/x
  3. Step 3: Cross multiply
    18,696.25x = 28,050.45 × 13,079.71
  4. Step 4: Simplify right side
    18,696.25x = 366,891,751.37
  5. Step 5: Solve for x
    x = 366,891,751.37/18,696.25
  6. Step 6: Final answer
    x = 19,623.82

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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.