Home / 12,664.20-18,947.70-8,290.20

Finding the Fourth Proportional to 12,664.20, 18,947.70 and 8,290.20

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Solution

The fourth proportional to 12,664.20, 18,947.70 and 8,290.20 is: 12,403.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,664.20 : 18,947.70 = 8,290.20 : x
  2. Step 2: Convert to fraction form
    12,664.20/18,947.70 = 8,290.20/x
  3. Step 3: Cross multiply
    12,664.20x = 18,947.70 × 8,290.20
  4. Step 4: Simplify right side
    12,664.20x = 157,080,222.54
  5. Step 5: Solve for x
    x = 157,080,222.54/12,664.20
  6. Step 6: Final answer
    x = 12,403.49

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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.