Home / 39,887.40-55,041.62-21,982.49

Finding the Fourth Proportional to 39,887.40, 55,041.62 and 21,982.49

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Solution

The fourth proportional to 39,887.40, 55,041.62 and 21,982.49 is: 30,334.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,887.40 : 55,041.62 = 21,982.49 : x
  2. Step 2: Convert to fraction form
    39,887.40/55,041.62 = 21,982.49/x
  3. Step 3: Cross multiply
    39,887.40x = 55,041.62 × 21,982.49
  4. Step 4: Simplify right side
    39,887.40x = 1,209,951,476.11
  5. Step 5: Solve for x
    x = 1,209,951,476.11/39,887.40
  6. Step 6: Final answer
    x = 30,334.18

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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.