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Finding the Fourth Proportional to 39,308.76, 54,245.81 and 21,403.76

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Solution

The fourth proportional to 39,308.76, 54,245.81 and 21,403.76 is: 29,537.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,308.76 : 54,245.81 = 21,403.76 : x
  2. Step 2: Convert to fraction form
    39,308.76/54,245.81 = 21,403.76/x
  3. Step 3: Cross multiply
    39,308.76x = 54,245.81 × 21,403.76
  4. Step 4: Simplify right side
    39,308.76x = 1,161,063,920.00
  5. Step 5: Solve for x
    x = 1,161,063,920.00/39,308.76
  6. Step 6: Final answer
    x = 29,537.03

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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.