Home / 39,363.21-54,321.57-21,458.70

Finding the Fourth Proportional to 39,363.21, 54,321.57 and 21,458.70

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Solution

The fourth proportional to 39,363.21, 54,321.57 and 21,458.70 is: 29,613.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,363.21 : 54,321.57 = 21,458.70 : x
  2. Step 2: Convert to fraction form
    39,363.21/54,321.57 = 21,458.70/x
  3. Step 3: Cross multiply
    39,363.21x = 54,321.57 × 21,458.70
  4. Step 4: Simplify right side
    39,363.21x = 1,165,670,274.16
  5. Step 5: Solve for x
    x = 1,165,670,274.16/39,363.21
  6. Step 6: Final answer
    x = 29,613.19

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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.