Home / 20,212.40-30,318.60-16,931.90

Finding the Fourth Proportional to 20,212.40, 30,318.60 and 16,931.90

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Solution

The fourth proportional to 20,212.40, 30,318.60 and 16,931.90 is: 25,397.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,212.40 : 30,318.60 = 16,931.90 : x
  2. Step 2: Convert to fraction form
    20,212.40/30,318.60 = 16,931.90/x
  3. Step 3: Cross multiply
    20,212.40x = 30,318.60 × 16,931.90
  4. Step 4: Simplify right side
    20,212.40x = 513,351,503.34
  5. Step 5: Solve for x
    x = 513,351,503.34/20,212.40
  6. Step 6: Final answer
    x = 25,397.85

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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.