Home / 39,884.40-55,037.48-21,979.49

Finding the Fourth Proportional to 39,884.40, 55,037.48 and 21,979.49

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Solution

The fourth proportional to 39,884.40, 55,037.48 and 21,979.49 is: 30,330.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,884.40 : 55,037.48 = 21,979.49 : x
  2. Step 2: Convert to fraction form
    39,884.40/55,037.48 = 21,979.49/x
  3. Step 3: Cross multiply
    39,884.40x = 55,037.48 × 21,979.49
  4. Step 4: Simplify right side
    39,884.40x = 1,209,695,356.20
  5. Step 5: Solve for x
    x = 1,209,695,356.20/39,884.40
  6. Step 6: Final answer
    x = 30,330.04

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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.