Home / 39,804-54,925.92-21,899.76

Finding the Fourth Proportional to 39,804, 54,925.92 and 21,899.76

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Solution

The fourth proportional to 39,804, 54,925.92 and 21,899.76 is: 30,219.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,804 : 54,925.92 = 21,899.76 : x
  2. Step 2: Convert to fraction form
    39,804/54,925.92 = 21,899.76/x
  3. Step 3: Cross multiply
    39,804x = 54,925.92 × 21,899.76
  4. Step 4: Simplify right side
    39,804x = 1,202,864,465.78
  5. Step 5: Solve for x
    x = 1,202,864,465.78/39,804
  6. Step 6: Final answer
    x = 30,219.69

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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.