Home / 39,885.36-55,039.19-21,980.37

Finding the Fourth Proportional to 39,885.36, 55,039.19 and 21,980.37

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Solution

The fourth proportional to 39,885.36, 55,039.19 and 21,980.37 is: 30,331.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,885.36 : 55,039.19 = 21,980.37 : x
  2. Step 2: Convert to fraction form
    39,885.36/55,039.19 = 21,980.37/x
  3. Step 3: Cross multiply
    39,885.36x = 55,039.19 × 21,980.37
  4. Step 4: Simplify right side
    39,885.36x = 1,209,781,760.70
  5. Step 5: Solve for x
    x = 1,209,781,760.70/39,885.36
  6. Step 6: Final answer
    x = 30,331.47

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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.