Home / 13,426.30-18,529.99-8,121.10

Finding the Fourth Proportional to 13,426.30, 18,529.99 and 8,121.10

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Solution

The fourth proportional to 13,426.30, 18,529.99 and 8,121.10 is: 11,208.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,426.30 : 18,529.99 = 8,121.10 : x
  2. Step 2: Convert to fraction form
    13,426.30/18,529.99 = 8,121.10/x
  3. Step 3: Cross multiply
    13,426.30x = 18,529.99 × 8,121.10
  4. Step 4: Simplify right side
    13,426.30x = 150,483,901.79
  5. Step 5: Solve for x
    x = 150,483,901.79/13,426.30
  6. Step 6: Final answer
    x = 11,208.14

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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.