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Finding the Fourth Proportional to 14,653.55, 20,221.94 and 7,939.14

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Solution

The fourth proportional to 14,653.55, 20,221.94 and 7,939.14 is: 10,956.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,653.55 : 20,221.94 = 7,939.14 : x
  2. Step 2: Convert to fraction form
    14,653.55/20,221.94 = 7,939.14/x
  3. Step 3: Cross multiply
    14,653.55x = 20,221.94 × 7,939.14
  4. Step 4: Simplify right side
    14,653.55x = 160,544,773.04
  5. Step 5: Solve for x
    x = 160,544,773.04/14,653.55
  6. Step 6: Final answer
    x = 10,956.04

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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.