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Finding the Fourth Proportional to 13,672.48, 20,495.76 and 4,432

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Solution

The fourth proportional to 13,672.48, 20,495.76 and 4,432 is: 6,643.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,672.48 : 20,495.76 = 4,432 : x
  2. Step 2: Convert to fraction form
    13,672.48/20,495.76 = 4,432/x
  3. Step 3: Cross multiply
    13,672.48x = 20,495.76 × 4,432
  4. Step 4: Simplify right side
    13,672.48x = 90,837,208.32
  5. Step 5: Solve for x
    x = 90,837,208.32/13,672.48
  6. Step 6: Final answer
    x = 6,643.80

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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.