Home / 20,614.87-28,435.86-18,217.14

Finding the Fourth Proportional to 20,614.87, 28,435.86 and 18,217.14

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Solution

The fourth proportional to 20,614.87, 28,435.86 and 18,217.14 is: 25,128.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,614.87 : 28,435.86 = 18,217.14 : x
  2. Step 2: Convert to fraction form
    20,614.87/28,435.86 = 18,217.14/x
  3. Step 3: Cross multiply
    20,614.87x = 28,435.86 × 18,217.14
  4. Step 4: Simplify right side
    20,614.87x = 518,020,149.27
  5. Step 5: Solve for x
    x = 518,020,149.27/20,614.87
  6. Step 6: Final answer
    x = 25,128.47

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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.