Home / 39,642.90-54,707.18-21,738.20

Finding the Fourth Proportional to 39,642.90, 54,707.18 and 21,738.20

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Solution

The fourth proportional to 39,642.90, 54,707.18 and 21,738.20 is: 29,998.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,642.90 : 54,707.18 = 21,738.20 : x
  2. Step 2: Convert to fraction form
    39,642.90/54,707.18 = 21,738.20/x
  3. Step 3: Cross multiply
    39,642.90x = 54,707.18 × 21,738.20
  4. Step 4: Simplify right side
    39,642.90x = 1,189,235,238.05
  5. Step 5: Solve for x
    x = 1,189,235,238.05/39,642.90
  6. Step 6: Final answer
    x = 29,998.69

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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.