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Finding the Fourth Proportional to 39,357.99, 54,314.89 and 21,453.89

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Solution

The fourth proportional to 39,357.99, 54,314.89 and 21,453.89 is: 29,606.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,357.99 : 54,314.89 = 21,453.89 : x
  2. Step 2: Convert to fraction form
    39,357.99/54,314.89 = 21,453.89/x
  3. Step 3: Cross multiply
    39,357.99x = 54,314.89 × 21,453.89
  4. Step 4: Simplify right side
    39,357.99x = 1,165,265,350.21
  5. Step 5: Solve for x
    x = 1,165,265,350.21/39,357.99
  6. Step 6: Final answer
    x = 29,606.83

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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.