Home / 39,128.39-53,997.49-21,223.47

Finding the Fourth Proportional to 39,128.39, 53,997.49 and 21,223.47

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Solution

The fourth proportional to 39,128.39, 53,997.49 and 21,223.47 is: 29,288.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,128.39 : 53,997.49 = 21,223.47 : x
  2. Step 2: Convert to fraction form
    39,128.39/53,997.49 = 21,223.47/x
  3. Step 3: Cross multiply
    39,128.39x = 53,997.49 × 21,223.47
  4. Step 4: Simplify right side
    39,128.39x = 1,146,013,914.99
  5. Step 5: Solve for x
    x = 1,146,013,914.99/39,128.39
  6. Step 6: Final answer
    x = 29,288.55

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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.