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Finding the Fourth Proportional to 39,124.80, 53,992.25 and 21,219.80

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Solution

The fourth proportional to 39,124.80, 53,992.25 and 21,219.80 is: 29,283.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,124.80 : 53,992.25 = 21,219.80 : x
  2. Step 2: Convert to fraction form
    39,124.80/53,992.25 = 21,219.80/x
  3. Step 3: Cross multiply
    39,124.80x = 53,992.25 × 21,219.80
  4. Step 4: Simplify right side
    39,124.80x = 1,145,704,370.49
  5. Step 5: Solve for x
    x = 1,145,704,370.49/39,124.80
  6. Step 6: Final answer
    x = 29,283.33

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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.