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Finding the Fourth Proportional to 38,445.44, 53,054.80 and 20,781.44

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Solution

The fourth proportional to 38,445.44, 53,054.80 and 20,781.44 is: 28,678.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,445.44 : 53,054.80 = 20,781.44 : x
  2. Step 2: Convert to fraction form
    38,445.44/53,054.80 = 20,781.44/x
  3. Step 3: Cross multiply
    38,445.44x = 53,054.80 × 20,781.44
  4. Step 4: Simplify right side
    38,445.44x = 1,102,555,142.91
  5. Step 5: Solve for x
    x = 1,102,555,142.91/38,445.44
  6. Step 6: Final answer
    x = 28,678.44

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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.