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Finding the Fourth Proportional to 38,649.99, 53,338.53 and 21,654.38

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Solution

The fourth proportional to 38,649.99, 53,338.53 and 21,654.38 is: 29,883.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,649.99 : 53,338.53 = 21,654.38 : x
  2. Step 2: Convert to fraction form
    38,649.99/53,338.53 = 21,654.38/x
  3. Step 3: Cross multiply
    38,649.99x = 53,338.53 × 21,654.38
  4. Step 4: Simplify right side
    38,649.99x = 1,155,012,679.09
  5. Step 5: Solve for x
    x = 1,155,012,679.09/38,649.99
  6. Step 6: Final answer
    x = 29,883.90

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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.