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Finding the Fourth Proportional to 14,643.99, 20,213.64 and 8,901.43

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Solution

The fourth proportional to 14,643.99, 20,213.64 and 8,901.43 is: 12,286.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,643.99 : 20,213.64 = 8,901.43 : x
  2. Step 2: Convert to fraction form
    14,643.99/20,213.64 = 8,901.43/x
  3. Step 3: Cross multiply
    14,643.99x = 20,213.64 × 8,901.43
  4. Step 4: Simplify right side
    14,643.99x = 179,930,155.93
  5. Step 5: Solve for x
    x = 179,930,155.93/14,643.99
  6. Step 6: Final answer
    x = 12,286.96

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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.