Home / 20,940.28-31,403.76-6,897.19

Finding the Fourth Proportional to 20,940.28, 31,403.76 and 6,897.19

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Solution

The fourth proportional to 20,940.28, 31,403.76 and 6,897.19 is: 10,343.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.28 : 31,403.76 = 6,897.19 : x
  2. Step 2: Convert to fraction form
    20,940.28/31,403.76 = 6,897.19/x
  3. Step 3: Cross multiply
    20,940.28x = 31,403.76 × 6,897.19
  4. Step 4: Simplify right side
    20,940.28x = 216,597,699.43
  5. Step 5: Solve for x
    x = 216,597,699.43/20,940.28
  6. Step 6: Final answer
    x = 10,343.59

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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.