Home / 20,961.72-31,582.53-18,962.73

Finding the Fourth Proportional to 20,961.72, 31,582.53 and 18,962.73

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Solution

The fourth proportional to 20,961.72, 31,582.53 and 18,962.73 is: 28,570.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,961.72 : 31,582.53 = 18,962.73 : x
  2. Step 2: Convert to fraction form
    20,961.72/31,582.53 = 18,962.73/x
  3. Step 3: Cross multiply
    20,961.72x = 31,582.53 × 18,962.73
  4. Step 4: Simplify right side
    20,961.72x = 598,890,989.11
  5. Step 5: Solve for x
    x = 598,890,989.11/20,961.72
  6. Step 6: Final answer
    x = 28,570.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.