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Finding the Fourth Proportional to 39,392.32, 54,358.32 and 21,486.28

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Solution

The fourth proportional to 39,392.32, 54,358.32 and 21,486.28 is: 29,649.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,392.32 : 54,358.32 = 21,486.28 : x
  2. Step 2: Convert to fraction form
    39,392.32/54,358.32 = 21,486.28/x
  3. Step 3: Cross multiply
    39,392.32x = 54,358.32 × 21,486.28
  4. Step 4: Simplify right side
    39,392.32x = 1,167,958,083.85
  5. Step 5: Solve for x
    x = 1,167,958,083.85/39,392.32
  6. Step 6: Final answer
    x = 29,649.39

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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.