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Finding the Fourth Proportional to 28,553.84, 39,404.04 and 15,978.72

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Solution

The fourth proportional to 28,553.84, 39,404.04 and 15,978.72 is: 22,050.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,553.84 : 39,404.04 = 15,978.72 : x
  2. Step 2: Convert to fraction form
    28,553.84/39,404.04 = 15,978.72/x
  3. Step 3: Cross multiply
    28,553.84x = 39,404.04 × 15,978.72
  4. Step 4: Simplify right side
    28,553.84x = 629,626,122.03
  5. Step 5: Solve for x
    x = 629,626,122.03/28,553.84
  6. Step 6: Final answer
    x = 22,050.49

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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.