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Finding the Fourth Proportional to 14,294.55, 19,725.90 and 7,921.24

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Solution

The fourth proportional to 14,294.55, 19,725.90 and 7,921.24 is: 10,930.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,294.55 : 19,725.90 = 7,921.24 : x
  2. Step 2: Convert to fraction form
    14,294.55/19,725.90 = 7,921.24/x
  3. Step 3: Cross multiply
    14,294.55x = 19,725.90 × 7,921.24
  4. Step 4: Simplify right side
    14,294.55x = 156,253,538.80
  5. Step 5: Solve for x
    x = 156,253,538.80/14,294.55
  6. Step 6: Final answer
    x = 10,930.99

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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.