Home / 21,143.93-29,171.99-12,190.22

Finding the Fourth Proportional to 21,143.93, 29,171.99 and 12,190.22

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Solution

The fourth proportional to 21,143.93, 29,171.99 and 12,190.22 is: 16,818.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,143.93 : 29,171.99 = 12,190.22 : x
  2. Step 2: Convert to fraction form
    21,143.93/29,171.99 = 12,190.22/x
  3. Step 3: Cross multiply
    21,143.93x = 29,171.99 × 12,190.22
  4. Step 4: Simplify right side
    21,143.93x = 355,612,769.13
  5. Step 5: Solve for x
    x = 355,612,769.13/21,143.93
  6. Step 6: Final answer
    x = 16,818.67

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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.