Home / 39,781.66-54,900.03-21,877.42

Finding the Fourth Proportional to 39,781.66, 54,900.03 and 21,877.42

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Solution

The fourth proportional to 39,781.66, 54,900.03 and 21,877.42 is: 30,191.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,781.66 : 54,900.03 = 21,877.42 : x
  2. Step 2: Convert to fraction form
    39,781.66/54,900.03 = 21,877.42/x
  3. Step 3: Cross multiply
    39,781.66x = 54,900.03 × 21,877.42
  4. Step 4: Simplify right side
    39,781.66x = 1,201,071,014.32
  5. Step 5: Solve for x
    x = 1,201,071,014.32/39,781.66
  6. Step 6: Final answer
    x = 30,191.58

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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.