Home / 31,511.21-43,470.95-20,175.26

Finding the Fourth Proportional to 31,511.21, 43,470.95 and 20,175.26

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Solution

The fourth proportional to 31,511.21, 43,470.95 and 20,175.26 is: 27,832.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,511.21 : 43,470.95 = 20,175.26 : x
  2. Step 2: Convert to fraction form
    31,511.21/43,470.95 = 20,175.26/x
  3. Step 3: Cross multiply
    31,511.21x = 43,470.95 × 20,175.26
  4. Step 4: Simplify right side
    31,511.21x = 877,037,400.47
  5. Step 5: Solve for x
    x = 877,037,400.47/31,511.21
  6. Step 6: Final answer
    x = 27,832.56

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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.