Home / 12,321.32-18,489.26-6,478.38

Finding the Fourth Proportional to 12,321.32, 18,489.26 and 6,478.38

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Solution

The fourth proportional to 12,321.32, 18,489.26 and 6,478.38 is: 9,721.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,321.32 : 18,489.26 = 6,478.38 : x
  2. Step 2: Convert to fraction form
    12,321.32/18,489.26 = 6,478.38/x
  3. Step 3: Cross multiply
    12,321.32x = 18,489.26 × 6,478.38
  4. Step 4: Simplify right side
    12,321.32x = 119,780,468.39
  5. Step 5: Solve for x
    x = 119,780,468.39/12,321.32
  6. Step 6: Final answer
    x = 9,721.40

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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.