Home / 39,290.34-54,222-21,385.99

Finding the Fourth Proportional to 39,290.34, 54,222 and 21,385.99

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Solution

The fourth proportional to 39,290.34, 54,222 and 21,385.99 is: 29,513.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,290.34 : 54,222 = 21,385.99 : x
  2. Step 2: Convert to fraction form
    39,290.34/54,222 = 21,385.99/x
  3. Step 3: Cross multiply
    39,290.34x = 54,222 × 21,385.99
  4. Step 4: Simplify right side
    39,290.34x = 1,159,591,149.78
  5. Step 5: Solve for x
    x = 1,159,591,149.78/39,290.34
  6. Step 6: Final answer
    x = 29,513.39

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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.