Home / 39,042.70-53,878.28-21,137.56

Finding the Fourth Proportional to 39,042.70, 53,878.28 and 21,137.56

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Solution

The fourth proportional to 39,042.70, 53,878.28 and 21,137.56 is: 29,169.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,042.70 : 53,878.28 = 21,137.56 : x
  2. Step 2: Convert to fraction form
    39,042.70/53,878.28 = 21,137.56/x
  3. Step 3: Cross multiply
    39,042.70x = 53,878.28 × 21,137.56
  4. Step 4: Simplify right side
    39,042.70x = 1,138,855,270.51
  5. Step 5: Solve for x
    x = 1,138,855,270.51/39,042.70
  6. Step 6: Final answer
    x = 29,169.48

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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.