Home / 20,512.45-28,293.13-12,558.61

Finding the Fourth Proportional to 20,512.45, 28,293.13 and 12,558.61

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Solution

The fourth proportional to 20,512.45, 28,293.13 and 12,558.61 is: 17,322.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,512.45 : 28,293.13 = 12,558.61 : x
  2. Step 2: Convert to fraction form
    20,512.45/28,293.13 = 12,558.61/x
  3. Step 3: Cross multiply
    20,512.45x = 28,293.13 × 12,558.61
  4. Step 4: Simplify right side
    20,512.45x = 355,322,436.41
  5. Step 5: Solve for x
    x = 355,322,436.41/20,512.45
  6. Step 6: Final answer
    x = 17,322.28

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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.