Home / 39,781.34-54,896.36-21,877.10

Finding the Fourth Proportional to 39,781.34, 54,896.36 and 21,877.10

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Solution

The fourth proportional to 39,781.34, 54,896.36 and 21,877.10 is: 30,189.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,781.34 : 54,896.36 = 21,877.10 : x
  2. Step 2: Convert to fraction form
    39,781.34/54,896.36 = 21,877.10/x
  3. Step 3: Cross multiply
    39,781.34x = 54,896.36 × 21,877.10
  4. Step 4: Simplify right side
    39,781.34x = 1,200,973,157.36
  5. Step 5: Solve for x
    x = 1,200,973,157.36/39,781.34
  6. Step 6: Final answer
    x = 30,189.36

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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.