Home / 29,109.24-40,139-19,661.40

Finding the Fourth Proportional to 29,109.24, 40,139 and 19,661.40

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Solution

The fourth proportional to 29,109.24, 40,139 and 19,661.40 is: 27,111.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,109.24 : 40,139 = 19,661.40 : x
  2. Step 2: Convert to fraction form
    29,109.24/40,139 = 19,661.40/x
  3. Step 3: Cross multiply
    29,109.24x = 40,139 × 19,661.40
  4. Step 4: Simplify right side
    29,109.24x = 789,188,934.60
  5. Step 5: Solve for x
    x = 789,188,934.60/29,109.24
  6. Step 6: Final answer
    x = 27,111.29

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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.