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Finding the Fourth Proportional to 39,483.51, 54,487.11 and 21,578.64

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Solution

The fourth proportional to 39,483.51, 54,487.11 and 21,578.64 is: 29,778.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,483.51 : 54,487.11 = 21,578.64 : x
  2. Step 2: Convert to fraction form
    39,483.51/54,487.11 = 21,578.64/x
  3. Step 3: Cross multiply
    39,483.51x = 54,487.11 × 21,578.64
  4. Step 4: Simplify right side
    39,483.51x = 1,175,757,731.33
  5. Step 5: Solve for x
    x = 1,175,757,731.33/39,483.51
  6. Step 6: Final answer
    x = 29,778.45

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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.