Home / 13,428.68-18,524.10-12,478.36

Finding the Fourth Proportional to 13,428.68, 18,524.10 and 12,478.36

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Solution

The fourth proportional to 13,428.68, 18,524.10 and 12,478.36 is: 17,213.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,428.68 : 18,524.10 = 12,478.36 : x
  2. Step 2: Convert to fraction form
    13,428.68/18,524.10 = 12,478.36/x
  3. Step 3: Cross multiply
    13,428.68x = 18,524.10 × 12,478.36
  4. Step 4: Simplify right side
    13,428.68x = 231,150,388.48
  5. Step 5: Solve for x
    x = 231,150,388.48/13,428.68
  6. Step 6: Final answer
    x = 17,213.19

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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.