Home / 31,578.21-43,592.10-20,829.42

Finding the Fourth Proportional to 31,578.21, 43,592.10 and 20,829.42

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Solution

The fourth proportional to 31,578.21, 43,592.10 and 20,829.42 is: 28,753.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,578.21 : 43,592.10 = 20,829.42 : x
  2. Step 2: Convert to fraction form
    31,578.21/43,592.10 = 20,829.42/x
  3. Step 3: Cross multiply
    31,578.21x = 43,592.10 × 20,829.42
  4. Step 4: Simplify right side
    31,578.21x = 907,998,159.58
  5. Step 5: Solve for x
    x = 907,998,159.58/31,578.21
  6. Step 6: Final answer
    x = 28,753.95

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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.