Home / 21,144.48-31,736.16-19,874.40

Finding the Fourth Proportional to 21,144.48, 31,736.16 and 19,874.40

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Solution

The fourth proportional to 21,144.48, 31,736.16 and 19,874.40 is: 29,829.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,144.48 : 31,736.16 = 19,874.40 : x
  2. Step 2: Convert to fraction form
    21,144.48/31,736.16 = 19,874.40/x
  3. Step 3: Cross multiply
    21,144.48x = 31,736.16 × 19,874.40
  4. Step 4: Simplify right side
    21,144.48x = 630,737,138.30
  5. Step 5: Solve for x
    x = 630,737,138.30/21,144.48
  6. Step 6: Final answer
    x = 29,829.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.