Home / 39,042.63-53,878.83-21,137.79

Finding the Fourth Proportional to 39,042.63, 53,878.83 and 21,137.79

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Solution

The fourth proportional to 39,042.63, 53,878.83 and 21,137.79 is: 29,170.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,042.63 : 53,878.83 = 21,137.79 : x
  2. Step 2: Convert to fraction form
    39,042.63/53,878.83 = 21,137.79/x
  3. Step 3: Cross multiply
    39,042.63x = 53,878.83 × 21,137.79
  4. Step 4: Simplify right side
    39,042.63x = 1,138,879,393.99
  5. Step 5: Solve for x
    x = 1,138,879,393.99/39,042.63
  6. Step 6: Final answer
    x = 29,170.15

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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.