Home / 39,770.31-54,881.62-21,865.20

Finding the Fourth Proportional to 39,770.31, 54,881.62 and 21,865.20

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Solution

The fourth proportional to 39,770.31, 54,881.62 and 21,865.20 is: 30,173.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,770.31 : 54,881.62 = 21,865.20 : x
  2. Step 2: Convert to fraction form
    39,770.31/54,881.62 = 21,865.20/x
  3. Step 3: Cross multiply
    39,770.31x = 54,881.62 × 21,865.20
  4. Step 4: Simplify right side
    39,770.31x = 1,199,997,597.62
  5. Step 5: Solve for x
    x = 1,199,997,597.62/39,770.31
  6. Step 6: Final answer
    x = 30,173.20

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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.