Home / 20,486.97-28,272.54-11,534.79

Finding the Fourth Proportional to 20,486.97, 28,272.54 and 11,534.79

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Solution

The fourth proportional to 20,486.97, 28,272.54 and 11,534.79 is: 15,918.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.97 : 28,272.54 = 11,534.79 : x
  2. Step 2: Convert to fraction form
    20,486.97/28,272.54 = 11,534.79/x
  3. Step 3: Cross multiply
    20,486.97x = 28,272.54 × 11,534.79
  4. Step 4: Simplify right side
    20,486.97x = 326,117,811.67
  5. Step 5: Solve for x
    x = 326,117,811.67/20,486.97
  6. Step 6: Final answer
    x = 15,918.30

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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.