Home / 13,188.24-19,631.70-12,991.41

Finding the Fourth Proportional to 13,188.24, 19,631.70 and 12,991.41

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Solution

The fourth proportional to 13,188.24, 19,631.70 and 12,991.41 is: 19,338.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,188.24 : 19,631.70 = 12,991.41 : x
  2. Step 2: Convert to fraction form
    13,188.24/19,631.70 = 12,991.41/x
  3. Step 3: Cross multiply
    13,188.24x = 19,631.70 × 12,991.41
  4. Step 4: Simplify right side
    13,188.24x = 255,043,463.70
  5. Step 5: Solve for x
    x = 255,043,463.70/13,188.24
  6. Step 6: Final answer
    x = 19,338.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.