Home / 20,712.38-28,558.35-16,921.58

Finding the Fourth Proportional to 20,712.38, 28,558.35 and 16,921.58

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Solution

The fourth proportional to 20,712.38, 28,558.35 and 16,921.58 is: 23,331.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,712.38 : 28,558.35 = 16,921.58 : x
  2. Step 2: Convert to fraction form
    20,712.38/28,558.35 = 16,921.58/x
  3. Step 3: Cross multiply
    20,712.38x = 28,558.35 × 16,921.58
  4. Step 4: Simplify right side
    20,712.38x = 483,252,404.19
  5. Step 5: Solve for x
    x = 483,252,404.19/20,712.38
  6. Step 6: Final answer
    x = 23,331.57

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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.