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Finding the Fourth Proportional to 38,668.53, 53,357.16 and 21,671.44

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Solution

The fourth proportional to 38,668.53, 53,357.16 and 21,671.44 is: 29,903.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,668.53 : 53,357.16 = 21,671.44 : x
  2. Step 2: Convert to fraction form
    38,668.53/53,357.16 = 21,671.44/x
  3. Step 3: Cross multiply
    38,668.53x = 53,357.16 × 21,671.44
  4. Step 4: Simplify right side
    38,668.53x = 1,156,326,739.52
  5. Step 5: Solve for x
    x = 1,156,326,739.52/38,668.53
  6. Step 6: Final answer
    x = 29,903.56

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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.