Home / 39,721.72-54,816.60-21,818.38

Finding the Fourth Proportional to 39,721.72, 54,816.60 and 21,818.38

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Solution

The fourth proportional to 39,721.72, 54,816.60 and 21,818.38 is: 30,109.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,721.72 : 54,816.60 = 21,818.38 : x
  2. Step 2: Convert to fraction form
    39,721.72/54,816.60 = 21,818.38/x
  3. Step 3: Cross multiply
    39,721.72x = 54,816.60 × 21,818.38
  4. Step 4: Simplify right side
    39,721.72x = 1,196,009,409.11
  5. Step 5: Solve for x
    x = 1,196,009,409.11/39,721.72
  6. Step 6: Final answer
    x = 30,109.71

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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.