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Finding the Fourth Proportional to 19,879.65, 27,426.15 and 11,377.22

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Solution

The fourth proportional to 19,879.65, 27,426.15 and 11,377.22 is: 15,696.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,879.65 : 27,426.15 = 11,377.22 : x
  2. Step 2: Convert to fraction form
    19,879.65/27,426.15 = 11,377.22/x
  3. Step 3: Cross multiply
    19,879.65x = 27,426.15 × 11,377.22
  4. Step 4: Simplify right side
    19,879.65x = 312,033,205.17
  5. Step 5: Solve for x
    x = 312,033,205.17/19,879.65
  6. Step 6: Final answer
    x = 15,696.11

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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.