Home / 20,669.40-28,524.60-11,718

Finding the Fourth Proportional to 20,669.40, 28,524.60 and 11,718

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Solution

The fourth proportional to 20,669.40, 28,524.60 and 11,718 is: 16,171.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,669.40 : 28,524.60 = 11,718 : x
  2. Step 2: Convert to fraction form
    20,669.40/28,524.60 = 11,718/x
  3. Step 3: Cross multiply
    20,669.40x = 28,524.60 × 11,718
  4. Step 4: Simplify right side
    20,669.40x = 334,251,262.80
  5. Step 5: Solve for x
    x = 334,251,262.80/20,669.40
  6. Step 6: Final answer
    x = 16,171.31

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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.