Home / 39,120.52-53,986.32-21,215.44

Finding the Fourth Proportional to 39,120.52, 53,986.32 and 21,215.44

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Solution

The fourth proportional to 39,120.52, 53,986.32 and 21,215.44 is: 29,277.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,120.52 : 53,986.32 = 21,215.44 : x
  2. Step 2: Convert to fraction form
    39,120.52/53,986.32 = 21,215.44/x
  3. Step 3: Cross multiply
    39,120.52x = 53,986.32 × 21,215.44
  4. Step 4: Simplify right side
    39,120.52x = 1,145,343,811.77
  5. Step 5: Solve for x
    x = 1,145,343,811.77/39,120.52
  6. Step 6: Final answer
    x = 29,277.32

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Similar ratio
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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.