Home / 39,308.79-54,247.11-21,404.78

Finding the Fourth Proportional to 39,308.79, 54,247.11 and 21,404.78

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Solution

The fourth proportional to 39,308.79, 54,247.11 and 21,404.78 is: 29,539.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,308.79 : 54,247.11 = 21,404.78 : x
  2. Step 2: Convert to fraction form
    39,308.79/54,247.11 = 21,404.78/x
  3. Step 3: Cross multiply
    39,308.79x = 54,247.11 × 21,404.78
  4. Step 4: Simplify right side
    39,308.79x = 1,161,147,455.19
  5. Step 5: Solve for x
    x = 1,161,147,455.19/39,308.79
  6. Step 6: Final answer
    x = 29,539.13

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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.