Home / 20,011.55-30,017.34-5,220.45

Finding the Fourth Proportional to 20,011.55, 30,017.34 and 5,220.45

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Solution

The fourth proportional to 20,011.55, 30,017.34 and 5,220.45 is: 7,830.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,011.55 : 30,017.34 = 5,220.45 : x
  2. Step 2: Convert to fraction form
    20,011.55/30,017.34 = 5,220.45/x
  3. Step 3: Cross multiply
    20,011.55x = 30,017.34 × 5,220.45
  4. Step 4: Simplify right side
    20,011.55x = 156,704,022.60
  5. Step 5: Solve for x
    x = 156,704,022.60/20,011.55
  6. Step 6: Final answer
    x = 7,830.68

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Similar ratio
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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.