Home / 19,881.24-27,430.08-11,920.56

Finding the Fourth Proportional to 19,881.24, 27,430.08 and 11,920.56

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Solution

The fourth proportional to 19,881.24, 27,430.08 and 11,920.56 is: 16,446.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,881.24 : 27,430.08 = 11,920.56 : x
  2. Step 2: Convert to fraction form
    19,881.24/27,430.08 = 11,920.56/x
  3. Step 3: Cross multiply
    19,881.24x = 27,430.08 × 11,920.56
  4. Step 4: Simplify right side
    19,881.24x = 326,981,914.44
  5. Step 5: Solve for x
    x = 326,981,914.44/19,881.24
  6. Step 6: Final answer
    x = 16,446.76

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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.