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Finding the Fourth Proportional to 20,889.95, 31,335.95 and 6,844.28

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Solution

The fourth proportional to 20,889.95, 31,335.95 and 6,844.28 is: 10,266.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,889.95 : 31,335.95 = 6,844.28 : x
  2. Step 2: Convert to fraction form
    20,889.95/31,335.95 = 6,844.28/x
  3. Step 3: Cross multiply
    20,889.95x = 31,335.95 × 6,844.28
  4. Step 4: Simplify right side
    20,889.95x = 214,472,015.87
  5. Step 5: Solve for x
    x = 214,472,015.87/20,889.95
  6. Step 6: Final answer
    x = 10,266.76

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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.