Home / 39,883.32-55,038.96-21,979.92

Finding the Fourth Proportional to 39,883.32, 55,038.96 and 21,979.92

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Solution

The fourth proportional to 39,883.32, 55,038.96 and 21,979.92 is: 30,332.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,883.32 : 55,038.96 = 21,979.92 : x
  2. Step 2: Convert to fraction form
    39,883.32/55,038.96 = 21,979.92/x
  3. Step 3: Cross multiply
    39,883.32x = 55,038.96 × 21,979.92
  4. Step 4: Simplify right side
    39,883.32x = 1,209,751,937.68
  5. Step 5: Solve for x
    x = 1,209,751,937.68/39,883.32
  6. Step 6: Final answer
    x = 30,332.28

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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.