Home / 39,121.94-53,987.90-21,217.34

Finding the Fourth Proportional to 39,121.94, 53,987.90 and 21,217.34

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Solution

The fourth proportional to 39,121.94, 53,987.90 and 21,217.34 is: 29,279.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,121.94 : 53,987.90 = 21,217.34 : x
  2. Step 2: Convert to fraction form
    39,121.94/53,987.90 = 21,217.34/x
  3. Step 3: Cross multiply
    39,121.94x = 53,987.90 × 21,217.34
  4. Step 4: Simplify right side
    39,121.94x = 1,145,479,630.19
  5. Step 5: Solve for x
    x = 1,145,479,630.19/39,121.94
  6. Step 6: Final answer
    x = 29,279.72

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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.