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Finding the Fourth Proportional to 38,732.80, 58,012.80 and 31,820.80

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Solution

The fourth proportional to 38,732.80, 58,012.80 and 31,820.80 is: 47,660.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,732.80 : 58,012.80 = 31,820.80 : x
  2. Step 2: Convert to fraction form
    38,732.80/58,012.80 = 31,820.80/x
  3. Step 3: Cross multiply
    38,732.80x = 58,012.80 × 31,820.80
  4. Step 4: Simplify right side
    38,732.80x = 1,846,013,706.24
  5. Step 5: Solve for x
    x = 1,846,013,706.24/38,732.80
  6. Step 6: Final answer
    x = 47,660.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.