Home / 20,998.20-31,497.30-19,394.40

Finding the Fourth Proportional to 20,998.20, 31,497.30 and 19,394.40

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Solution

The fourth proportional to 20,998.20, 31,497.30 and 19,394.40 is: 29,091.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,998.20 : 31,497.30 = 19,394.40 : x
  2. Step 2: Convert to fraction form
    20,998.20/31,497.30 = 19,394.40/x
  3. Step 3: Cross multiply
    20,998.20x = 31,497.30 × 19,394.40
  4. Step 4: Simplify right side
    20,998.20x = 610,871,235.12
  5. Step 5: Solve for x
    x = 610,871,235.12/20,998.20
  6. Step 6: Final answer
    x = 29,091.60

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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.