Home / 13,571.84-18,729.60-12,949.76

Finding the Fourth Proportional to 13,571.84, 18,729.60 and 12,949.76

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Solution

The fourth proportional to 13,571.84, 18,729.60 and 12,949.76 is: 17,871.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,571.84 : 18,729.60 = 12,949.76 : x
  2. Step 2: Convert to fraction form
    13,571.84/18,729.60 = 12,949.76/x
  3. Step 3: Cross multiply
    13,571.84x = 18,729.60 × 12,949.76
  4. Step 4: Simplify right side
    13,571.84x = 242,543,824.90
  5. Step 5: Solve for x
    x = 242,543,824.90/13,571.84
  6. Step 6: Final answer
    x = 17,871.11

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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.