Home / 12,415.68-17,128.80-7,698.24

Finding the Fourth Proportional to 12,415.68, 17,128.80 and 7,698.24

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Solution

The fourth proportional to 12,415.68, 17,128.80 and 7,698.24 is: 10,620.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,415.68 : 17,128.80 = 7,698.24 : x
  2. Step 2: Convert to fraction form
    12,415.68/17,128.80 = 7,698.24/x
  3. Step 3: Cross multiply
    12,415.68x = 17,128.80 × 7,698.24
  4. Step 4: Simplify right side
    12,415.68x = 131,861,613.31
  5. Step 5: Solve for x
    x = 131,861,613.31/12,415.68
  6. Step 6: Final answer
    x = 10,620.57

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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.