Home / 39,894.33-55,053.45-21,989.40

Finding the Fourth Proportional to 39,894.33, 55,053.45 and 21,989.40

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Solution

The fourth proportional to 39,894.33, 55,053.45 and 21,989.40 is: 30,344.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,894.33 : 55,053.45 = 21,989.40 : x
  2. Step 2: Convert to fraction form
    39,894.33/55,053.45 = 21,989.40/x
  3. Step 3: Cross multiply
    39,894.33x = 55,053.45 × 21,989.40
  4. Step 4: Simplify right side
    39,894.33x = 1,210,592,333.43
  5. Step 5: Solve for x
    x = 1,210,592,333.43/39,894.33
  6. Step 6: Final answer
    x = 30,344.97

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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.