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Finding the Fourth Proportional to 15,014.28, 20,719.77 and 8,299.89

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Solution

The fourth proportional to 15,014.28, 20,719.77 and 8,299.89 is: 11,453.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,014.28 : 20,719.77 = 8,299.89 : x
  2. Step 2: Convert to fraction form
    15,014.28/20,719.77 = 8,299.89/x
  3. Step 3: Cross multiply
    15,014.28x = 20,719.77 × 8,299.89
  4. Step 4: Simplify right side
    15,014.28x = 171,971,811.83
  5. Step 5: Solve for x
    x = 171,971,811.83/15,014.28
  6. Step 6: Final answer
    x = 11,453.88

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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.