Home / 12,405.68-18,615.90-4,508.81

Finding the Fourth Proportional to 12,405.68, 18,615.90 and 4,508.81

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Solution

The fourth proportional to 12,405.68, 18,615.90 and 4,508.81 is: 6,765.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.68 : 18,615.90 = 4,508.81 : x
  2. Step 2: Convert to fraction form
    12,405.68/18,615.90 = 4,508.81/x
  3. Step 3: Cross multiply
    12,405.68x = 18,615.90 × 4,508.81
  4. Step 4: Simplify right side
    12,405.68x = 83,935,556.08
  5. Step 5: Solve for x
    x = 83,935,556.08/12,405.68
  6. Step 6: Final answer
    x = 6,765.90

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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.