Home / 20,828.80-28,739.17-12,326.68

Finding the Fourth Proportional to 20,828.80, 28,739.17 and 12,326.68

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Solution

The fourth proportional to 20,828.80, 28,739.17 and 12,326.68 is: 17,008.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,828.80 : 28,739.17 = 12,326.68 : x
  2. Step 2: Convert to fraction form
    20,828.80/28,739.17 = 12,326.68/x
  3. Step 3: Cross multiply
    20,828.80x = 28,739.17 × 12,326.68
  4. Step 4: Simplify right side
    20,828.80x = 354,258,552.06
  5. Step 5: Solve for x
    x = 354,258,552.06/20,828.80
  6. Step 6: Final answer
    x = 17,008.11

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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.