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Finding the Fourth Proportional to 20,573.28, 30,867.48 and 8,729.64

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Solution

The fourth proportional to 20,573.28, 30,867.48 and 8,729.64 is: 13,097.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,573.28 : 30,867.48 = 8,729.64 : x
  2. Step 2: Convert to fraction form
    20,573.28/30,867.48 = 8,729.64/x
  3. Step 3: Cross multiply
    20,573.28x = 30,867.48 × 8,729.64
  4. Step 4: Simplify right side
    20,573.28x = 269,461,988.11
  5. Step 5: Solve for x
    x = 269,461,988.11/20,573.28
  6. Step 6: Final answer
    x = 13,097.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.