Home / 21,286.50-31,902.31-19,957.87

Finding the Fourth Proportional to 21,286.50, 31,902.31 and 19,957.87

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Solution

The fourth proportional to 21,286.50, 31,902.31 and 19,957.87 is: 29,911.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,286.50 : 31,902.31 = 19,957.87 : x
  2. Step 2: Convert to fraction form
    21,286.50/31,902.31 = 19,957.87/x
  3. Step 3: Cross multiply
    21,286.50x = 31,902.31 × 19,957.87
  4. Step 4: Simplify right side
    21,286.50x = 636,702,155.68
  5. Step 5: Solve for x
    x = 636,702,155.68/21,286.50
  6. Step 6: Final answer
    x = 29,911.08

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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.