Home / 20,930.19-31,399.91-6,889.65

Finding the Fourth Proportional to 20,930.19, 31,399.91 and 6,889.65

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Solution

The fourth proportional to 20,930.19, 31,399.91 and 6,889.65 is: 10,336.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.19 : 31,399.91 = 6,889.65 : x
  2. Step 2: Convert to fraction form
    20,930.19/31,399.91 = 6,889.65/x
  3. Step 3: Cross multiply
    20,930.19x = 31,399.91 × 6,889.65
  4. Step 4: Simplify right side
    20,930.19x = 216,334,389.93
  5. Step 5: Solve for x
    x = 216,334,389.93/20,930.19
  6. Step 6: Final answer
    x = 10,336.00

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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.