Home / 39,147.80-54,023.69-21,242.35

Finding the Fourth Proportional to 39,147.80, 54,023.69 and 21,242.35

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Solution

The fourth proportional to 39,147.80, 54,023.69 and 21,242.35 is: 29,314.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,147.80 : 54,023.69 = 21,242.35 : x
  2. Step 2: Convert to fraction form
    39,147.80/54,023.69 = 21,242.35/x
  3. Step 3: Cross multiply
    39,147.80x = 54,023.69 × 21,242.35
  4. Step 4: Simplify right side
    39,147.80x = 1,147,589,861.15
  5. Step 5: Solve for x
    x = 1,147,589,861.15/39,147.80
  6. Step 6: Final answer
    x = 29,314.29

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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.