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Finding the Fourth Proportional to 14,700.44, 20,286.99 and 7,986.45

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Solution

The fourth proportional to 14,700.44, 20,286.99 and 7,986.45 is: 11,021.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,700.44 : 20,286.99 = 7,986.45 : x
  2. Step 2: Convert to fraction form
    14,700.44/20,286.99 = 7,986.45/x
  3. Step 3: Cross multiply
    14,700.44x = 20,286.99 × 7,986.45
  4. Step 4: Simplify right side
    14,700.44x = 162,021,031.29
  5. Step 5: Solve for x
    x = 162,021,031.29/14,700.44
  6. Step 6: Final answer
    x = 11,021.51

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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.