Home / 39,699.22-54,781.47-21,794.20

Finding the Fourth Proportional to 39,699.22, 54,781.47 and 21,794.20

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Solution

The fourth proportional to 39,699.22, 54,781.47 and 21,794.20 is: 30,074.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,699.22 : 54,781.47 = 21,794.20 : x
  2. Step 2: Convert to fraction form
    39,699.22/54,781.47 = 21,794.20/x
  3. Step 3: Cross multiply
    39,699.22x = 54,781.47 × 21,794.20
  4. Step 4: Simplify right side
    39,699.22x = 1,193,918,313.47
  5. Step 5: Solve for x
    x = 1,193,918,313.47/39,699.22
  6. Step 6: Final answer
    x = 30,074.10

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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.