Home / 20,555.94-28,380.60-12,602.55

Finding the Fourth Proportional to 20,555.94, 28,380.60 and 12,602.55

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Solution

The fourth proportional to 20,555.94, 28,380.60 and 12,602.55 is: 17,399.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,555.94 : 28,380.60 = 12,602.55 : x
  2. Step 2: Convert to fraction form
    20,555.94/28,380.60 = 12,602.55/x
  3. Step 3: Cross multiply
    20,555.94x = 28,380.60 × 12,602.55
  4. Step 4: Simplify right side
    20,555.94x = 357,667,930.53
  5. Step 5: Solve for x
    x = 357,667,930.53/20,555.94
  6. Step 6: Final answer
    x = 17,399.74

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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.