Home / 12,786.20-17,642.26-7,478.63

Finding the Fourth Proportional to 12,786.20, 17,642.26 and 7,478.63

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Solution

The fourth proportional to 12,786.20, 17,642.26 and 7,478.63 is: 10,318.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,786.20 : 17,642.26 = 7,478.63 : x
  2. Step 2: Convert to fraction form
    12,786.20/17,642.26 = 7,478.63/x
  3. Step 3: Cross multiply
    12,786.20x = 17,642.26 × 7,478.63
  4. Step 4: Simplify right side
    12,786.20x = 131,939,880.13
  5. Step 5: Solve for x
    x = 131,939,880.13/12,786.20
  6. Step 6: Final answer
    x = 10,318.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.