Home / 12,309.20-18,438.96-10,426.88

Finding the Fourth Proportional to 12,309.20, 18,438.96 and 10,426.88

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Solution

The fourth proportional to 12,309.20, 18,438.96 and 10,426.88 is: 15,619.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,309.20 : 18,438.96 = 10,426.88 : x
  2. Step 2: Convert to fraction form
    12,309.20/18,438.96 = 10,426.88/x
  3. Step 3: Cross multiply
    12,309.20x = 18,438.96 × 10,426.88
  4. Step 4: Simplify right side
    12,309.20x = 192,260,823.24
  5. Step 5: Solve for x
    x = 192,260,823.24/12,309.20
  6. Step 6: Final answer
    x = 15,619.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.