Home / 13,428.36-18,523.68-12,478.05

Finding the Fourth Proportional to 13,428.36, 18,523.68 and 12,478.05

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Solution

The fourth proportional to 13,428.36, 18,523.68 and 12,478.05 is: 17,212.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.36 : 18,523.68 = 12,478.05 : x
  2. Step 2: Convert to fraction form
    13,428.36/18,523.68 = 12,478.05/x
  3. Step 3: Cross multiply
    13,428.36x = 18,523.68 × 12,478.05
  4. Step 4: Simplify right side
    13,428.36x = 231,139,405.22
  5. Step 5: Solve for x
    x = 231,139,405.22/13,428.36
  6. Step 6: Final answer
    x = 17,212.78

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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.