Home / 39,042.29-53,878.79-21,137.68

Finding the Fourth Proportional to 39,042.29, 53,878.79 and 21,137.68

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Solution

The fourth proportional to 39,042.29, 53,878.79 and 21,137.68 is: 29,170.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,042.29 : 53,878.79 = 21,137.68 : x
  2. Step 2: Convert to fraction form
    39,042.29/53,878.79 = 21,137.68/x
  3. Step 3: Cross multiply
    39,042.29x = 53,878.79 × 21,137.68
  4. Step 4: Simplify right side
    39,042.29x = 1,138,872,621.81
  5. Step 5: Solve for x
    x = 1,138,872,621.81/39,042.29
  6. Step 6: Final answer
    x = 29,170.23

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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.