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Finding the Fourth Proportional to 28,549.62, 39,400.29 and 15,978.42

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Solution

The fourth proportional to 28,549.62, 39,400.29 and 15,978.42 is: 22,051.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,549.62 : 39,400.29 = 15,978.42 : x
  2. Step 2: Convert to fraction form
    28,549.62/39,400.29 = 15,978.42/x
  3. Step 3: Cross multiply
    28,549.62x = 39,400.29 × 15,978.42
  4. Step 4: Simplify right side
    28,549.62x = 629,554,381.74
  5. Step 5: Solve for x
    x = 629,554,381.74/28,549.62
  6. Step 6: Final answer
    x = 22,051.24

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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.