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Finding the Fourth Proportional to 28,774.52, 39,721.14 and 19,348.56

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Solution

The fourth proportional to 28,774.52, 39,721.14 and 19,348.56 is: 26,709.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,774.52 : 39,721.14 = 19,348.56 : x
  2. Step 2: Convert to fraction form
    28,774.52/39,721.14 = 19,348.56/x
  3. Step 3: Cross multiply
    28,774.52x = 39,721.14 × 19,348.56
  4. Step 4: Simplify right side
    28,774.52x = 768,546,860.56
  5. Step 5: Solve for x
    x = 768,546,860.56/28,774.52
  6. Step 6: Final answer
    x = 26,709.29

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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.