Home / 20,147.12-30,219.78-7,000.54

Finding the Fourth Proportional to 20,147.12, 30,219.78 and 7,000.54

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Solution

The fourth proportional to 20,147.12, 30,219.78 and 7,000.54 is: 10,500.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,147.12 : 30,219.78 = 7,000.54 : x
  2. Step 2: Convert to fraction form
    20,147.12/30,219.78 = 7,000.54/x
  3. Step 3: Cross multiply
    20,147.12x = 30,219.78 × 7,000.54
  4. Step 4: Simplify right side
    20,147.12x = 211,554,778.68
  5. Step 5: Solve for x
    x = 211,554,778.68/20,147.12
  6. Step 6: Final answer
    x = 10,500.50

Related Problems

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Half scale
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Double scale
Find fourth proportional to 20,148.12, 30,221.28 and 7,001.54
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.