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Finding the Fourth Proportional to 28,173.88, 38,880.22 and 15,598.90

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Solution

The fourth proportional to 28,173.88, 38,880.22 and 15,598.90 is: 21,526.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,173.88 : 38,880.22 = 15,598.90 : x
  2. Step 2: Convert to fraction form
    28,173.88/38,880.22 = 15,598.90/x
  3. Step 3: Cross multiply
    28,173.88x = 38,880.22 × 15,598.90
  4. Step 4: Simplify right side
    28,173.88x = 606,488,469.36
  5. Step 5: Solve for x
    x = 606,488,469.36/28,173.88
  6. Step 6: Final answer
    x = 21,526.63

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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.