Home / 39,884.41-55,040.85-21,980.06

Finding the Fourth Proportional to 39,884.41, 55,040.85 and 21,980.06

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Solution

The fourth proportional to 39,884.41, 55,040.85 and 21,980.06 is: 30,332.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,884.41 : 55,040.85 = 21,980.06 : x
  2. Step 2: Convert to fraction form
    39,884.41/55,040.85 = 21,980.06/x
  3. Step 3: Cross multiply
    39,884.41x = 55,040.85 × 21,980.06
  4. Step 4: Simplify right side
    39,884.41x = 1,209,800,800.35
  5. Step 5: Solve for x
    x = 1,209,800,800.35/39,884.41
  6. Step 6: Final answer
    x = 30,332.68

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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.