Home / 20,516.67-30,778.65-7,190.55

Finding the Fourth Proportional to 20,516.67, 30,778.65 and 7,190.55

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Solution

The fourth proportional to 20,516.67, 30,778.65 and 7,190.55 is: 10,787.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,516.67 : 30,778.65 = 7,190.55 : x
  2. Step 2: Convert to fraction form
    20,516.67/30,778.65 = 7,190.55/x
  3. Step 3: Cross multiply
    20,516.67x = 30,778.65 × 7,190.55
  4. Step 4: Simplify right side
    20,516.67x = 221,315,421.76
  5. Step 5: Solve for x
    x = 221,315,421.76/20,516.67
  6. Step 6: Final answer
    x = 10,787.10

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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.