Home / 31,370.45-43,272.20-18,615.23

Finding the Fourth Proportional to 31,370.45, 43,272.20 and 18,615.23

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Solution

The fourth proportional to 31,370.45, 43,272.20 and 18,615.23 is: 25,677.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,370.45 : 43,272.20 = 18,615.23 : x
  2. Step 2: Convert to fraction form
    31,370.45/43,272.20 = 18,615.23/x
  3. Step 3: Cross multiply
    31,370.45x = 43,272.20 × 18,615.23
  4. Step 4: Simplify right side
    31,370.45x = 805,521,955.61
  5. Step 5: Solve for x
    x = 805,521,955.61/31,370.45
  6. Step 6: Final answer
    x = 25,677.73

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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.