Home / 39,887.78-55,045.14-21,738.51

Finding the Fourth Proportional to 39,887.78, 55,045.14 and 21,738.51

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Solution

The fourth proportional to 39,887.78, 55,045.14 and 21,738.51 is: 29,999.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,887.78 : 55,045.14 = 21,738.51 : x
  2. Step 2: Convert to fraction form
    39,887.78/55,045.14 = 21,738.51/x
  3. Step 3: Cross multiply
    39,887.78x = 55,045.14 × 21,738.51
  4. Step 4: Simplify right side
    39,887.78x = 1,196,599,326.34
  5. Step 5: Solve for x
    x = 1,196,599,326.34/39,887.78
  6. Step 6: Final answer
    x = 29,999.15

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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.