Home / 20,740.40-31,077.20-12,416.42

Finding the Fourth Proportional to 20,740.40, 31,077.20 and 12,416.42

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Solution

The fourth proportional to 20,740.40, 31,077.20 and 12,416.42 is: 18,604.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,740.40 : 31,077.20 = 12,416.42 : x
  2. Step 2: Convert to fraction form
    20,740.40/31,077.20 = 12,416.42/x
  3. Step 3: Cross multiply
    20,740.40x = 31,077.20 × 12,416.42
  4. Step 4: Simplify right side
    20,740.40x = 385,867,567.62
  5. Step 5: Solve for x
    x = 385,867,567.62/20,740.40
  6. Step 6: Final answer
    x = 18,604.63

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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.