Home / 12,399.72-17,113.62-9,571.20

Finding the Fourth Proportional to 12,399.72, 17,113.62 and 9,571.20

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Solution

The fourth proportional to 12,399.72, 17,113.62 and 9,571.20 is: 13,209.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,399.72 : 17,113.62 = 9,571.20 : x
  2. Step 2: Convert to fraction form
    12,399.72/17,113.62 = 9,571.20/x
  3. Step 3: Cross multiply
    12,399.72x = 17,113.62 × 9,571.20
  4. Step 4: Simplify right side
    12,399.72x = 163,797,879.74
  5. Step 5: Solve for x
    x = 163,797,879.74/12,399.72
  6. Step 6: Final answer
    x = 13,209.80

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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.