Home / 20,891.90-31,336.17-9,795.74

Finding the Fourth Proportional to 20,891.90, 31,336.17 and 9,795.74

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Solution

The fourth proportional to 20,891.90, 31,336.17 and 9,795.74 is: 14,692.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.90 : 31,336.17 = 9,795.74 : x
  2. Step 2: Convert to fraction form
    20,891.90/31,336.17 = 9,795.74/x
  3. Step 3: Cross multiply
    20,891.90x = 31,336.17 × 9,795.74
  4. Step 4: Simplify right side
    20,891.90x = 306,960,973.92
  5. Step 5: Solve for x
    x = 306,960,973.92/20,891.90
  6. Step 6: Final answer
    x = 14,692.82

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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.