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Finding the Fourth Proportional to 38,874.02, 53,648.85 and 21,879.89

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Solution

The fourth proportional to 38,874.02, 53,648.85 and 21,879.89 is: 30,195.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,874.02 : 53,648.85 = 21,879.89 : x
  2. Step 2: Convert to fraction form
    38,874.02/53,648.85 = 21,879.89/x
  3. Step 3: Cross multiply
    38,874.02x = 53,648.85 × 21,879.89
  4. Step 4: Simplify right side
    38,874.02x = 1,173,830,668.38
  5. Step 5: Solve for x
    x = 1,173,830,668.38/38,874.02
  6. Step 6: Final answer
    x = 30,195.77

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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.