Home / 39,860.72-55,007.71-21,956.93

Finding the Fourth Proportional to 39,860.72, 55,007.71 and 21,956.93

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Solution

The fourth proportional to 39,860.72, 55,007.71 and 21,956.93 is: 30,300.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,860.72 : 55,007.71 = 21,956.93 : x
  2. Step 2: Convert to fraction form
    39,860.72/55,007.71 = 21,956.93/x
  3. Step 3: Cross multiply
    39,860.72x = 55,007.71 × 21,956.93
  4. Step 4: Simplify right side
    39,860.72x = 1,207,800,053.11
  5. Step 5: Solve for x
    x = 1,207,800,053.11/39,860.72
  6. Step 6: Final answer
    x = 30,300.51

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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.