Home / 20,387.21-28,121.37-14,730.27

Finding the Fourth Proportional to 20,387.21, 28,121.37 and 14,730.27

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Solution

The fourth proportional to 20,387.21, 28,121.37 and 14,730.27 is: 20,318.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,387.21 : 28,121.37 = 14,730.27 : x
  2. Step 2: Convert to fraction form
    20,387.21/28,121.37 = 14,730.27/x
  3. Step 3: Cross multiply
    20,387.21x = 28,121.37 × 14,730.27
  4. Step 4: Simplify right side
    20,387.21x = 414,235,372.87
  5. Step 5: Solve for x
    x = 414,235,372.87/20,387.21
  6. Step 6: Final answer
    x = 20,318.40

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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.