Home / 39,884.09-55,040.42-21,979.74

Finding the Fourth Proportional to 39,884.09, 55,040.42 and 21,979.74

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Solution

The fourth proportional to 39,884.09, 55,040.42 and 21,979.74 is: 30,332.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,884.09 : 55,040.42 = 21,979.74 : x
  2. Step 2: Convert to fraction form
    39,884.09/55,040.42 = 21,979.74/x
  3. Step 3: Cross multiply
    39,884.09x = 55,040.42 × 21,979.74
  4. Step 4: Simplify right side
    39,884.09x = 1,209,774,011.19
  5. Step 5: Solve for x
    x = 1,209,774,011.19/39,884.09
  6. Step 6: Final answer
    x = 30,332.24

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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.