Home / 39,718.51-54,812.50-21,813.90

Finding the Fourth Proportional to 39,718.51, 54,812.50 and 21,813.90

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Solution

The fourth proportional to 39,718.51, 54,812.50 and 21,813.90 is: 30,103.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,718.51 : 54,812.50 = 21,813.90 : x
  2. Step 2: Convert to fraction form
    39,718.51/54,812.50 = 21,813.90/x
  3. Step 3: Cross multiply
    39,718.51x = 54,812.50 × 21,813.90
  4. Step 4: Simplify right side
    39,718.51x = 1,195,674,393.75
  5. Step 5: Solve for x
    x = 1,195,674,393.75/39,718.51
  6. Step 6: Final answer
    x = 30,103.71

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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.