Home / 12,378.66-18,574.37-8,221.54

Finding the Fourth Proportional to 12,378.66, 18,574.37 and 8,221.54

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Solution

The fourth proportional to 12,378.66, 18,574.37 and 8,221.54 is: 12,336.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,378.66 : 18,574.37 = 8,221.54 : x
  2. Step 2: Convert to fraction form
    12,378.66/18,574.37 = 8,221.54/x
  3. Step 3: Cross multiply
    12,378.66x = 18,574.37 × 8,221.54
  4. Step 4: Simplify right side
    12,378.66x = 152,709,925.93
  5. Step 5: Solve for x
    x = 152,709,925.93/12,378.66
  6. Step 6: Final answer
    x = 12,336.55

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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.