Home / 20,992.12-31,420.14-15,444.28

Finding the Fourth Proportional to 20,992.12, 31,420.14 and 15,444.28

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Solution

The fourth proportional to 20,992.12, 31,420.14 and 15,444.28 is: 23,116.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.12 : 31,420.14 = 15,444.28 : x
  2. Step 2: Convert to fraction form
    20,992.12/31,420.14 = 15,444.28/x
  3. Step 3: Cross multiply
    20,992.12x = 31,420.14 × 15,444.28
  4. Step 4: Simplify right side
    20,992.12x = 485,261,439.80
  5. Step 5: Solve for x
    x = 485,261,439.80/20,992.12
  6. Step 6: Final answer
    x = 23,116.36

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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.