Home / 39,643.65-54,708.21-21,738.95

Finding the Fourth Proportional to 39,643.65, 54,708.21 and 21,738.95

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Solution

The fourth proportional to 39,643.65, 54,708.21 and 21,738.95 is: 29,999.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,643.65 : 54,708.21 = 21,738.95 : x
  2. Step 2: Convert to fraction form
    39,643.65/54,708.21 = 21,738.95/x
  3. Step 3: Cross multiply
    39,643.65x = 54,708.21 × 21,738.95
  4. Step 4: Simplify right side
    39,643.65x = 1,189,298,768.24
  5. Step 5: Solve for x
    x = 1,189,298,768.24/39,643.65
  6. Step 6: Final answer
    x = 29,999.73

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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.