Home / 18,917.55-28,380.42-5,769.57

Finding the Fourth Proportional to 18,917.55, 28,380.42 and 5,769.57

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Solution

The fourth proportional to 18,917.55, 28,380.42 and 5,769.57 is: 8,655.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,917.55 : 28,380.42 = 5,769.57 : x
  2. Step 2: Convert to fraction form
    18,917.55/28,380.42 = 5,769.57/x
  3. Step 3: Cross multiply
    18,917.55x = 28,380.42 × 5,769.57
  4. Step 4: Simplify right side
    18,917.55x = 163,742,819.82
  5. Step 5: Solve for x
    x = 163,742,819.82/18,917.55
  6. Step 6: Final answer
    x = 8,655.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.