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Finding the Fourth Proportional to 28,907.78, 39,844.98 and 19,344.22

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Solution

The fourth proportional to 28,907.78, 39,844.98 and 19,344.22 is: 26,663.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,907.78 : 39,844.98 = 19,344.22 : x
  2. Step 2: Convert to fraction form
    28,907.78/39,844.98 = 19,344.22/x
  3. Step 3: Cross multiply
    28,907.78x = 39,844.98 × 19,344.22
  4. Step 4: Simplify right side
    28,907.78x = 770,769,959.40
  5. Step 5: Solve for x
    x = 770,769,959.40/28,907.78
  6. Step 6: Final answer
    x = 26,663.07

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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.