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Finding the Fourth Proportional to 43,307.70, 64,963.37 and 13,724.88

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Solution

The fourth proportional to 43,307.70, 64,963.37 and 13,724.88 is: 20,587.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,307.70 : 64,963.37 = 13,724.88 : x
  2. Step 2: Convert to fraction form
    43,307.70/64,963.37 = 13,724.88/x
  3. Step 3: Cross multiply
    43,307.70x = 64,963.37 × 13,724.88
  4. Step 4: Simplify right side
    43,307.70x = 891,614,248.35
  5. Step 5: Solve for x
    x = 891,614,248.35/43,307.70
  6. Step 6: Final answer
    x = 20,587.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.