Home / 20,275.79-27,959.09-13,911.68

Finding the Fourth Proportional to 20,275.79, 27,959.09 and 13,911.68

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Solution

The fourth proportional to 20,275.79, 27,959.09 and 13,911.68 is: 19,183.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,275.79 : 27,959.09 = 13,911.68 : x
  2. Step 2: Convert to fraction form
    20,275.79/27,959.09 = 13,911.68/x
  3. Step 3: Cross multiply
    20,275.79x = 27,959.09 × 13,911.68
  4. Step 4: Simplify right side
    20,275.79x = 388,957,834.49
  5. Step 5: Solve for x
    x = 388,957,834.49/20,275.79
  6. Step 6: Final answer
    x = 19,183.37

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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.