Home / 31,515-43,491.24-20,356.44

Finding the Fourth Proportional to 31,515, 43,491.24 and 20,356.44

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Solution

The fourth proportional to 31,515, 43,491.24 and 20,356.44 is: 28,092.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,515 : 43,491.24 = 20,356.44 : x
  2. Step 2: Convert to fraction form
    31,515/43,491.24 = 20,356.44/x
  3. Step 3: Cross multiply
    31,515x = 43,491.24 × 20,356.44
  4. Step 4: Simplify right side
    31,515x = 885,326,817.59
  5. Step 5: Solve for x
    x = 885,326,817.59/31,515
  6. Step 6: Final answer
    x = 28,092.24

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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.