Home / 5,420.72-8,145.48-5,070.80

Finding the Fourth Proportional to 5,420.72, 8,145.48 and 5,070.80

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Solution

The fourth proportional to 5,420.72, 8,145.48 and 5,070.80 is: 7,619.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.72 : 8,145.48 = 5,070.80 : x
  2. Step 2: Convert to fraction form
    5,420.72/8,145.48 = 5,070.80/x
  3. Step 3: Cross multiply
    5,420.72x = 8,145.48 × 5,070.80
  4. Step 4: Simplify right side
    5,420.72x = 41,304,099.98
  5. Step 5: Solve for x
    x = 41,304,099.98/5,420.72
  6. Step 6: Final answer
    x = 7,619.67

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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.