Home / 18,858.18-28,288.64-5,711.58

Finding the Fourth Proportional to 18,858.18, 28,288.64 and 5,711.58

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Solution

The fourth proportional to 18,858.18, 28,288.64 and 5,711.58 is: 8,567.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,858.18 : 28,288.64 = 5,711.58 : x
  2. Step 2: Convert to fraction form
    18,858.18/28,288.64 = 5,711.58/x
  3. Step 3: Cross multiply
    18,858.18x = 28,288.64 × 5,711.58
  4. Step 4: Simplify right side
    18,858.18x = 161,572,844.73
  5. Step 5: Solve for x
    x = 161,572,844.73/18,858.18
  6. Step 6: Final answer
    x = 8,567.78

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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.