Home / 31,474.51-43,420.15-18,720.52

Finding the Fourth Proportional to 31,474.51, 43,420.15 and 18,720.52

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Solution

The fourth proportional to 31,474.51, 43,420.15 and 18,720.52 is: 25,825.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,474.51 : 43,420.15 = 18,720.52 : x
  2. Step 2: Convert to fraction form
    31,474.51/43,420.15 = 18,720.52/x
  3. Step 3: Cross multiply
    31,474.51x = 43,420.15 × 18,720.52
  4. Step 4: Simplify right side
    31,474.51x = 812,847,786.48
  5. Step 5: Solve for x
    x = 812,847,786.48/31,474.51
  6. Step 6: Final answer
    x = 25,825.59

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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.