Home / 39,865.28-55,014.15-21,960.36

Finding the Fourth Proportional to 39,865.28, 55,014.15 and 21,960.36

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Solution

The fourth proportional to 39,865.28, 55,014.15 and 21,960.36 is: 30,305.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,865.28 : 55,014.15 = 21,960.36 : x
  2. Step 2: Convert to fraction form
    39,865.28/55,014.15 = 21,960.36/x
  3. Step 3: Cross multiply
    39,865.28x = 55,014.15 × 21,960.36
  4. Step 4: Simplify right side
    39,865.28x = 1,208,130,539.09
  5. Step 5: Solve for x
    x = 1,208,130,539.09/39,865.28
  6. Step 6: Final answer
    x = 30,305.33

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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.