Home / 39,719.88-54,813.40-21,816.02

Finding the Fourth Proportional to 39,719.88, 54,813.40 and 21,816.02

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Solution

The fourth proportional to 39,719.88, 54,813.40 and 21,816.02 is: 30,106.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,719.88 : 54,813.40 = 21,816.02 : x
  2. Step 2: Convert to fraction form
    39,719.88/54,813.40 = 21,816.02/x
  3. Step 3: Cross multiply
    39,719.88x = 54,813.40 × 21,816.02
  4. Step 4: Simplify right side
    39,719.88x = 1,195,810,313.16
  5. Step 5: Solve for x
    x = 1,195,810,313.16/39,719.88
  6. Step 6: Final answer
    x = 30,106.09

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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.