Home / 31,680.57-43,706.76-20,348.51

Finding the Fourth Proportional to 31,680.57, 43,706.76 and 20,348.51

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Solution

The fourth proportional to 31,680.57, 43,706.76 and 20,348.51 is: 28,072.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,680.57 : 43,706.76 = 20,348.51 : x
  2. Step 2: Convert to fraction form
    31,680.57/43,706.76 = 20,348.51/x
  3. Step 3: Cross multiply
    31,680.57x = 43,706.76 × 20,348.51
  4. Step 4: Simplify right side
    31,680.57x = 889,367,224.39
  5. Step 5: Solve for x
    x = 889,367,224.39/31,680.57
  6. Step 6: Final answer
    x = 28,072.96

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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.