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Finding the Fourth Proportional to 14,694.99, 20,278.90 and 8,321.40

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Solution

The fourth proportional to 14,694.99, 20,278.90 and 8,321.40 is: 11,483.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,694.99 : 20,278.90 = 8,321.40 : x
  2. Step 2: Convert to fraction form
    14,694.99/20,278.90 = 8,321.40/x
  3. Step 3: Cross multiply
    14,694.99x = 20,278.90 × 8,321.40
  4. Step 4: Simplify right side
    14,694.99x = 168,748,848.86
  5. Step 5: Solve for x
    x = 168,748,848.86/14,694.99
  6. Step 6: Final answer
    x = 11,483.43

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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.