Home / 39,884.16-55,040.51-21,979.80

Finding the Fourth Proportional to 39,884.16, 55,040.51 and 21,979.80

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Solution

The fourth proportional to 39,884.16, 55,040.51 and 21,979.80 is: 30,332.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,884.16 : 55,040.51 = 21,979.80 : x
  2. Step 2: Convert to fraction form
    39,884.16/55,040.51 = 21,979.80/x
  3. Step 3: Cross multiply
    39,884.16x = 55,040.51 × 21,979.80
  4. Step 4: Simplify right side
    39,884.16x = 1,209,779,401.70
  5. Step 5: Solve for x
    x = 1,209,779,401.70/39,884.16
  6. Step 6: Final answer
    x = 30,332.33

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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.