Home / 39,884.42-55,041.17-21,979.28

Finding the Fourth Proportional to 39,884.42, 55,041.17 and 21,979.28

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Solution

The fourth proportional to 39,884.42, 55,041.17 and 21,979.28 is: 30,331.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,884.42 : 55,041.17 = 21,979.28 : x
  2. Step 2: Convert to fraction form
    39,884.42/55,041.17 = 21,979.28/x
  3. Step 3: Cross multiply
    39,884.42x = 55,041.17 × 21,979.28
  4. Step 4: Simplify right side
    39,884.42x = 1,209,764,901.86
  5. Step 5: Solve for x
    x = 1,209,764,901.86/39,884.42
  6. Step 6: Final answer
    x = 30,331.77

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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.