Home / 39,483.89-54,487.79-21,578.91

Finding the Fourth Proportional to 39,483.89, 54,487.79 and 21,578.91

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Solution

The fourth proportional to 39,483.89, 54,487.79 and 21,578.91 is: 29,778.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,483.89 : 54,487.79 = 21,578.91 : x
  2. Step 2: Convert to fraction form
    39,483.89/54,487.79 = 21,578.91/x
  3. Step 3: Cross multiply
    39,483.89x = 54,487.79 × 21,578.91
  4. Step 4: Simplify right side
    39,483.89x = 1,175,786,885.21
  5. Step 5: Solve for x
    x = 1,175,786,885.21/39,483.89
  6. Step 6: Final answer
    x = 29,778.90

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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.