Home / 39,615.58-54,669-21,709.54

Finding the Fourth Proportional to 39,615.58, 54,669 and 21,709.54

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Solution

The fourth proportional to 39,615.58, 54,669 and 21,709.54 is: 29,958.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,615.58 : 54,669 = 21,709.54 : x
  2. Step 2: Convert to fraction form
    39,615.58/54,669 = 21,709.54/x
  3. Step 3: Cross multiply
    39,615.58x = 54,669 × 21,709.54
  4. Step 4: Simplify right side
    39,615.58x = 1,186,838,842.26
  5. Step 5: Solve for x
    x = 1,186,838,842.26/39,615.58
  6. Step 6: Final answer
    x = 29,958.89

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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.