Home / 39,385.21-54,350.94-21,479.15

Finding the Fourth Proportional to 39,385.21, 54,350.94 and 21,479.15

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Solution

The fourth proportional to 39,385.21, 54,350.94 and 21,479.15 is: 29,640.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,385.21 : 54,350.94 = 21,479.15 : x
  2. Step 2: Convert to fraction form
    39,385.21/54,350.94 = 21,479.15/x
  3. Step 3: Cross multiply
    39,385.21x = 54,350.94 × 21,479.15
  4. Step 4: Simplify right side
    39,385.21x = 1,167,411,905.44
  5. Step 5: Solve for x
    x = 1,167,411,905.44/39,385.21
  6. Step 6: Final answer
    x = 29,640.87

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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.