Home / 12,239.48-18,344.64-6,392.90

Finding the Fourth Proportional to 12,239.48, 18,344.64 and 6,392.90

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Solution

The fourth proportional to 12,239.48, 18,344.64 and 6,392.90 is: 9,581.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,239.48 : 18,344.64 = 6,392.90 : x
  2. Step 2: Convert to fraction form
    12,239.48/18,344.64 = 6,392.90/x
  3. Step 3: Cross multiply
    12,239.48x = 18,344.64 × 6,392.90
  4. Step 4: Simplify right side
    12,239.48x = 117,275,449.06
  5. Step 5: Solve for x
    x = 117,275,449.06/12,239.48
  6. Step 6: Final answer
    x = 9,581.73

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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.