Home / 28,921.48-39,920.66-18,832.20

Finding the Fourth Proportional to 28,921.48, 39,920.66 and 18,832.20

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Solution

The fourth proportional to 28,921.48, 39,920.66 and 18,832.20 is: 25,994.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,921.48 : 39,920.66 = 18,832.20 : x
  2. Step 2: Convert to fraction form
    28,921.48/39,920.66 = 18,832.20/x
  3. Step 3: Cross multiply
    28,921.48x = 39,920.66 × 18,832.20
  4. Step 4: Simplify right side
    28,921.48x = 751,793,853.25
  5. Step 5: Solve for x
    x = 751,793,853.25/28,921.48
  6. Step 6: Final answer
    x = 25,994.31

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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.