Home / 20,743.24-31,119.72-11,980.66

Finding the Fourth Proportional to 20,743.24, 31,119.72 and 11,980.66

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Solution

The fourth proportional to 20,743.24, 31,119.72 and 11,980.66 is: 17,973.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,743.24 : 31,119.72 = 11,980.66 : x
  2. Step 2: Convert to fraction form
    20,743.24/31,119.72 = 11,980.66/x
  3. Step 3: Cross multiply
    20,743.24x = 31,119.72 × 11,980.66
  4. Step 4: Simplify right side
    20,743.24x = 372,834,784.62
  5. Step 5: Solve for x
    x = 372,834,784.62/20,743.24
  6. Step 6: Final answer
    x = 17,973.80

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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.