Home / 20,935.70-31,389.84-6,890.88

Finding the Fourth Proportional to 20,935.70, 31,389.84 and 6,890.88

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Solution

The fourth proportional to 20,935.70, 31,389.84 and 6,890.88 is: 10,331.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.70 : 31,389.84 = 6,890.88 : x
  2. Step 2: Convert to fraction form
    20,935.70/31,389.84 = 6,890.88/x
  3. Step 3: Cross multiply
    20,935.70x = 31,389.84 × 6,890.88
  4. Step 4: Simplify right side
    20,935.70x = 216,303,620.66
  5. Step 5: Solve for x
    x = 216,303,620.66/20,935.70
  6. Step 6: Final answer
    x = 10,331.81

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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.