Home / 20,930.57-31,389.64-6,888.00

Finding the Fourth Proportional to 20,930.57, 31,389.64 and 6,888.00

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Solution

The fourth proportional to 20,930.57, 31,389.64 and 6,888.00 is: 10,329.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.57 : 31,389.64 = 6,888.00 : x
  2. Step 2: Convert to fraction form
    20,930.57/31,389.64 = 6,888.00/x
  3. Step 3: Cross multiply
    20,930.57x = 31,389.64 × 6,888.00
  4. Step 4: Simplify right side
    20,930.57x = 216,211,940.81
  5. Step 5: Solve for x
    x = 216,211,940.81/20,930.57
  6. Step 6: Final answer
    x = 10,329.96

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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.