Home / 31,283.18-43,136.20-19,934.70

Finding the Fourth Proportional to 31,283.18, 43,136.20 and 19,934.70

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Solution

The fourth proportional to 31,283.18, 43,136.20 and 19,934.70 is: 27,487.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,283.18 : 43,136.20 = 19,934.70 : x
  2. Step 2: Convert to fraction form
    31,283.18/43,136.20 = 19,934.70/x
  3. Step 3: Cross multiply
    31,283.18x = 43,136.20 × 19,934.70
  4. Step 4: Simplify right side
    31,283.18x = 859,907,433.26
  5. Step 5: Solve for x
    x = 859,907,433.26/31,283.18
  6. Step 6: Final answer
    x = 27,487.85

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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.