Home / 39,142.85-54,017.27-21,237.90

Finding the Fourth Proportional to 39,142.85, 54,017.27 and 21,237.90

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Solution

The fourth proportional to 39,142.85, 54,017.27 and 21,237.90 is: 29,308.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,142.85 : 54,017.27 = 21,237.90 : x
  2. Step 2: Convert to fraction form
    39,142.85/54,017.27 = 21,237.90/x
  3. Step 3: Cross multiply
    39,142.85x = 54,017.27 × 21,237.90
  4. Step 4: Simplify right side
    39,142.85x = 1,147,213,272.34
  5. Step 5: Solve for x
    x = 1,147,213,272.34/39,142.85
  6. Step 6: Final answer
    x = 29,308.38

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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.