Home / 20,279-27,984.95-11,326.51

Finding the Fourth Proportional to 20,279, 27,984.95 and 11,326.51

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Solution

The fourth proportional to 20,279, 27,984.95 and 11,326.51 is: 15,630.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,279 : 27,984.95 = 11,326.51 : x
  2. Step 2: Convert to fraction form
    20,279/27,984.95 = 11,326.51/x
  3. Step 3: Cross multiply
    20,279x = 27,984.95 × 11,326.51
  4. Step 4: Simplify right side
    20,279x = 316,971,676.10
  5. Step 5: Solve for x
    x = 316,971,676.10/20,279
  6. Step 6: Final answer
    x = 15,630.54

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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.