Home / 39,879.72-55,032.01-21,971.83

Finding the Fourth Proportional to 39,879.72, 55,032.01 and 21,971.83

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Solution

The fourth proportional to 39,879.72, 55,032.01 and 21,971.83 is: 30,320.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,879.72 : 55,032.01 = 21,971.83 : x
  2. Step 2: Convert to fraction form
    39,879.72/55,032.01 = 21,971.83/x
  3. Step 3: Cross multiply
    39,879.72x = 55,032.01 × 21,971.83
  4. Step 4: Simplify right side
    39,879.72x = 1,209,153,968.28
  5. Step 5: Solve for x
    x = 1,209,153,968.28/39,879.72
  6. Step 6: Final answer
    x = 30,320.02

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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.