Home / 39,965.30-55,153.45-21,817.10

Finding the Fourth Proportional to 39,965.30, 55,153.45 and 21,817.10

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Solution

The fourth proportional to 39,965.30, 55,153.45 and 21,817.10 is: 30,108.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,965.30 : 55,153.45 = 21,817.10 : x
  2. Step 2: Convert to fraction form
    39,965.30/55,153.45 = 21,817.10/x
  3. Step 3: Cross multiply
    39,965.30x = 55,153.45 × 21,817.10
  4. Step 4: Simplify right side
    39,965.30x = 1,203,288,334.00
  5. Step 5: Solve for x
    x = 1,203,288,334.00/39,965.30
  6. Step 6: Final answer
    x = 30,108.33

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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.