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Finding the Fourth Proportional to 15,029.20, 20,744.76 and 9,723.88

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Solution

The fourth proportional to 15,029.20, 20,744.76 and 9,723.88 is: 13,421.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,029.20 : 20,744.76 = 9,723.88 : x
  2. Step 2: Convert to fraction form
    15,029.20/20,744.76 = 9,723.88/x
  3. Step 3: Cross multiply
    15,029.20x = 20,744.76 × 9,723.88
  4. Step 4: Simplify right side
    15,029.20x = 201,719,556.87
  5. Step 5: Solve for x
    x = 201,719,556.87/15,029.20
  6. Step 6: Final answer
    x = 13,421.84

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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.