Home / 31,668.49-43,695.66-20,187.76

Finding the Fourth Proportional to 31,668.49, 43,695.66 and 20,187.76

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Solution

The fourth proportional to 31,668.49, 43,695.66 and 20,187.76 is: 27,854.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,668.49 : 43,695.66 = 20,187.76 : x
  2. Step 2: Convert to fraction form
    31,668.49/43,695.66 = 20,187.76/x
  3. Step 3: Cross multiply
    31,668.49x = 43,695.66 × 20,187.76
  4. Step 4: Simplify right side
    31,668.49x = 882,117,387.88
  5. Step 5: Solve for x
    x = 882,117,387.88/31,668.49
  6. Step 6: Final answer
    x = 27,854.74

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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.