Home / 20,923.97-28,871.57-12,540.47

Finding the Fourth Proportional to 20,923.97, 28,871.57 and 12,540.47

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Solution

The fourth proportional to 20,923.97, 28,871.57 and 12,540.47 is: 17,303.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,923.97 : 28,871.57 = 12,540.47 : x
  2. Step 2: Convert to fraction form
    20,923.97/28,871.57 = 12,540.47/x
  3. Step 3: Cross multiply
    20,923.97x = 28,871.57 × 12,540.47
  4. Step 4: Simplify right side
    20,923.97x = 362,062,944.43
  5. Step 5: Solve for x
    x = 362,062,944.43/20,923.97
  6. Step 6: Final answer
    x = 17,303.74

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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.