Home / 39,139.29-54,017.31-21,918.21

Finding the Fourth Proportional to 39,139.29, 54,017.31 and 21,918.21

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Solution

The fourth proportional to 39,139.29, 54,017.31 and 21,918.21 is: 30,249.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,139.29 : 54,017.31 = 21,918.21 : x
  2. Step 2: Convert to fraction form
    39,139.29/54,017.31 = 21,918.21/x
  3. Step 3: Cross multiply
    39,139.29x = 54,017.31 × 21,918.21
  4. Step 4: Simplify right side
    39,139.29x = 1,183,962,804.40
  5. Step 5: Solve for x
    x = 1,183,962,804.40/39,139.29
  6. Step 6: Final answer
    x = 30,249.98

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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.