Home / 31,381.27-43,295.72-18,638.35

Finding the Fourth Proportional to 31,381.27, 43,295.72 and 18,638.35

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Solution

The fourth proportional to 31,381.27, 43,295.72 and 18,638.35 is: 25,714.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,381.27 : 43,295.72 = 18,638.35 : x
  2. Step 2: Convert to fraction form
    31,381.27/43,295.72 = 18,638.35/x
  3. Step 3: Cross multiply
    31,381.27x = 43,295.72 × 18,638.35
  4. Step 4: Simplify right side
    31,381.27x = 806,960,581.43
  5. Step 5: Solve for x
    x = 806,960,581.43/31,381.27
  6. Step 6: Final answer
    x = 25,714.72

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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.