Home / 13,378.55-18,546.89-12,667.50

Finding the Fourth Proportional to 13,378.55, 18,546.89 and 12,667.50

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Solution

The fourth proportional to 13,378.55, 18,546.89 and 12,667.50 is: 17,561.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,378.55 : 18,546.89 = 12,667.50 : x
  2. Step 2: Convert to fraction form
    13,378.55/18,546.89 = 12,667.50/x
  3. Step 3: Cross multiply
    13,378.55x = 18,546.89 × 12,667.50
  4. Step 4: Simplify right side
    13,378.55x = 234,942,665.74
  5. Step 5: Solve for x
    x = 234,942,665.74/13,378.55
  6. Step 6: Final answer
    x = 17,561.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.