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Finding the Fourth Proportional to 13,571.76, 18,729.01 and 7,603.47

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Solution

The fourth proportional to 13,571.76, 18,729.01 and 7,603.47 is: 10,492.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,571.76 : 18,729.01 = 7,603.47 : x
  2. Step 2: Convert to fraction form
    13,571.76/18,729.01 = 7,603.47/x
  3. Step 3: Cross multiply
    13,571.76x = 18,729.01 × 7,603.47
  4. Step 4: Simplify right side
    13,571.76x = 142,405,446.66
  5. Step 5: Solve for x
    x = 142,405,446.66/13,571.76
  6. Step 6: Final answer
    x = 10,492.78

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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.