Home / 20,787.84-31,103.28-19,662.48

Finding the Fourth Proportional to 20,787.84, 31,103.28 and 19,662.48

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Solution

The fourth proportional to 20,787.84, 31,103.28 and 19,662.48 is: 29,419.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,787.84 : 31,103.28 = 19,662.48 : x
  2. Step 2: Convert to fraction form
    20,787.84/31,103.28 = 19,662.48/x
  3. Step 3: Cross multiply
    20,787.84x = 31,103.28 × 19,662.48
  4. Step 4: Simplify right side
    20,787.84x = 611,567,620.93
  5. Step 5: Solve for x
    x = 611,567,620.93/20,787.84
  6. Step 6: Final answer
    x = 29,419.49

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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.