Home / 20,614.68-28,435.60-18,216.96

Finding the Fourth Proportional to 20,614.68, 28,435.60 and 18,216.96

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Solution

The fourth proportional to 20,614.68, 28,435.60 and 18,216.96 is: 25,128.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,614.68 : 28,435.60 = 18,216.96 : x
  2. Step 2: Convert to fraction form
    20,614.68/28,435.60 = 18,216.96/x
  3. Step 3: Cross multiply
    20,614.68x = 28,435.60 × 18,216.96
  4. Step 4: Simplify right side
    20,614.68x = 518,010,103.91
  5. Step 5: Solve for x
    x = 518,010,103.91/20,614.68
  6. Step 6: Final answer
    x = 25,128.21

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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.